Sanitising Apparatus Technical Field of the Invention The present invention relates to an apparatus for sanitising an object. In particular, but not limited to, an apparatus for sanitising a human body. Background to the Invention When an individual afflicted with a viral or bacterial infection, in particular an infectious disease which affects the respiratory tract, such as influenza or Covid-19, coughs, sneezes or exhales, the infected individual may expel over 100 million viral respiratory droplets. The result is such that the respiratory droplets which contain the bacteria or virus (pathogens) are dispersed into the surrounding environment. The respiratory droplets may settle on surfaces where the pathogens can remain viable for up to several days. Thus, the surrounding environment of an infected individual can serve as a source of transmission of the pathogens (contact transmission). Common settings for contact transmission are, for example, public transport, bars, restaurants and events which draw large numbers of individuals. In these settings, an infected person may cough, sneeze or breathe onto an individual who is not infected, or onto a surface which an individual who is not infected may come into contact with. Often, the otherwise healthy individual may carry the respiratory droplets upon their external envelope, that is to say the person’s skin, clothing and accessories exposed to the surrounding environment, with or without themselves becoming infected. This individual may then carry the pathogens to other settings and, potentially, offload the pathogens onto other surfaces which then act as a source of contact transmission if touched by another individual. Settings which draw large crowds of people are particularly at risk of such contact transmission, for example sport and music events, offices and transport hubs such as railway stations and airports. Attempts have been made to limit the spread of pathogens, particularly in response to the Covid-19 pandemic. Such attempts include, for example, employing hand sanitiser stations or sanitising chambers at the entrance to the aforementioned settings. However, there are a number of disadvantages associated with hand sanitiser stations and sanitising chambers as attempts to reduce the spread of pathogens. For example, the use of hand sanitiser is often at the discretion of the individual. Many individuals will not feel compelled to use hand sanitiser when entering premises especially if they are feeling well. Moreover, hand sanitiser is used on an individual’s hands only. This does not overcome the problem of a person carrying pathogens upon other parts of their external envelope and transmitting the pathogens from their external envelope onto a surface within the premises into which they enter. Further, a disadvantage of known sanitising chambers is that a user is required to enter the chamber, stop for potentially up to 30 seconds while they are sprayed with a sanitising solution, rotate 90°, stop for potentially up to 30 seconds while they are again sprayed with a sanitising solution, then exit the chamber. A sanitising chamber of this type has a considerably low throughput of people and is, therefore, not commercially viable for transport hubs and large events, such as sport and music events, where a high throughput of people is essential to prevent crowding and delays. Further, such chambers often do not measure vital criteria of an individual which can indicate whether the individual may be infected with a disease, for example the individual’s body temperature. As such, while the chamber may, albeit ineffectively, attempt to sanitise an individual’s external envelope, the sick individual is still permitted access to the premises which he is aiming to enter. As such, the individual may still cough, sneeze or breath (etc.) onto surfaces within the premises and, therefore, offload viable pathogens onto surfaces within the premises. Moreover, such chambers typically expel a sanitising solution as a spray from nozzles positioned on each of the two side walls of the chamber at a single point along the chamber. This arrangement of nozzles and method of expelling sanitising solution does not provide an effective means of sanitisation of an individual within the channel. For example, it may be that the individual is not stood in the correct position to be substantially contacted by the expelled solution. In this respect, upon exiting the chamber, the individual will likely have substantial portions of their external envelope which have not been contacted by the sanitising solution and, therefore, may still carry viable pathogens. Attempts to expel a greater volume of sanitising solution onto an individual within the chamber often result in rendering the individual wet with the sanitising solution, which is clearly not desirable for the individual. Moreover, known sanitising chambers are typically permanent structures built within the confides of a transport hub, for example an airport. Attempts to provide a sanitising chamber which is suitable for use in a variety of locations and which can be transported between locations quickly and easily are not known to the applicant. In light of the above, it is an object of the embodiments of the invention to provide an apparatus which completely sanitises, or at least sanitises a significant portion of, an individual’s external envelope. It is also an object of embodiments of the present invention to provide an apparatus which allows a high throughput of sanitised individuals. It is also an object of embodiments of the invention to provide an apparatus which is capable of being transported quickly and easily to different locations. Summary of the Invention According to a broad aspect of the present invention, there is provided a transportable apparatus for sanitising an object with a disinfection solution. Embodiments of the present invention provide an apparatus which can be transported directly to a location, for example a sports event or music event, where anti- pathogenic sanitisation of a number of objects, in particular people, is required. According to a first aspect of the present invention, there is provided a transportable apparatus for sanitising an object with a disinfection solution, the apparatus comprising a channel along which an object is able to pass through, the apparatus comprising one or more disinfection solution atomisers arranged to expel a mist of disinfection solution such that, in use, a fog of disinfection solution occupies the channel. In this regard, the channel may provide a walkway for an object, in particular a person, to move along through the channel. The channel may comprise a partitioning wall such that the apparatus comprises two or more walkways within the channel. Each walkway may be defined by an interior side wall, a top wall, a partitioning wall and a bottom wall. An object may enter each walkway via a first door providing a point of entrance to the apparatus. An object may exit each walkway via a second door providing a point of exit from the apparatus. The bottom wall may comprise a non-slip finishing upon which an object moves, in particular, on which a person walks through the apparatus. Each walkway may comprise a turn or bend. By this, we mean that the each walkway is ‘L’-shaped or substantially ‘L’-shaped. The turn or bend may be at an angle of between about 45- 135°, between about 55-125°, between about 65-115°, between about 75-105°, between about 80-100°, or about 90°. The channel may be defined by a number of interior walls. The channel may be defined by a number of interior walls such that the number of interior walls define a channel volume. The apparatus may comprise an interior front wall, an interior rear wall, an interior first side wall, an interior second side wall, an interior top wall and an interior bottom wall. The interior front wall, interior rear wall, interior first side wall, interior second side wall, interior top wall and interior bottom wall may define the channel. The channel may connect the first door and the second door. The first door and/or the second door may be roller shutters. The first door and the second door may be a clam shell arrangement, such that the lower half, or portion, or each door folds downwardly to provide an access or exit ramp, and the top half, or portion, folds upwardly to provide a canopy. Beneficially, the clam shell arrangement acts as a wind deflector to prevent, or reduce, wind entering the channel. Further beneficially, the clam shell arrangement removes the need for separate ramps to be stored within the apparatus. The apparatus may be absent of any door(s). That is to say that the apparatus may not comprise a doorway operable to be closed at the point of entry and/or exit to the or each channel and/or walkway. Beneficially, the absence of doors may be preferable when the apparatus is deployed for use in conjunction with an entrance/exit point of a building or when the apparatus is within a building, for example within the foyer of a building, such as a hotel, hospital or office block building, or in the foyer of a theatre or other place of public gathering. The apparatus may have a cross-section which is substantially rectangular- shaped when viewed along a channel or walkway. By this, we mean that the apparatus may comprise an interior first side wall, an interior second side wall, an interior top wall and an interior bottom wall. The interior first side wall, interior second side wall, interior top wall and interior bottom wall may define the channel. At least one wall, preferably the first side wall or the second side wall, may comprise a ‘fresh’ tank and a ‘waste’ tank for the storage of disinfection solution prior to being expelled, and the storage of disinfection solution after being expelled, respectively. The ‘fresh’ tank and/or the ‘waste’ tank may be formed within the dimensions of the at least one wall, preferably the first side wall or the second side wall. At least one solution dispensing frame may comprise the one or more disinfection solution atomisers. The apparatus may comprise three solution dispensing frames. The one or more solution dispensing frames may be 3D-solution dispensing frames. By ‘3D-solution dispensing frame’, we mean a frame that dispenses or expels disinfection solution in more than one direction, for example, in three different directions. The one or more solution dispensing frames may be substantially n-shaped, for example such that the, or each, solution dispensing frame is affixed to an interior first side wall of the apparatus, an interior second side wall of the apparatus and an interior top wall of the apparatus. The one or more solution dispensing frames may be arranged to expel disinfection solution into the channel. The one or more solution dispensing frames may be arranged to expel disinfection solution as a mist such that the channel is completely, or at least substantially, occupied by a fog of the disinfection solution when the apparatus is in use. That is to say that the channel volume is occupied completely, or at least substantially, by the fog of the disinfection solution. The one or more solution dispensing frames may each comprise nine solution atomisers. A portion of the one or more solution dispensing frames positioned on an interior top wall of the channel may comprise one or more solution atomisers. A portion of the one or more solution dispensing frames positioned on the interior first side wall of the channel may comprise one or more solution atomisers. A portion of the one or more solution dispensing frames positioned on the interior second side wall of the channel may comprise one or more solution atomisers. Each portion of the one or more solution dispensing frames may comprise three solution atomisers. The three solution atomisers may be positioned at regular intervals along each portion of the respective solution dispensing frame. The one or more solution atomisers may be arranged to expel the disinfection solution as a mist. The one or more solution atomisers may be arranged to expel the disinfection solution as a mist such that the channel is completely, or at least substantially, occupied by the fog of the disinfection solution. By ‘mist’ we mean the form of the solution as it is expelled from the solution dispensing frame, or from a solution atomiser. By ‘fog’, we mean that the disinfection solution, once expelled, is in the form of an aerosol comprising the disinfection solution, a predominant amount of the aerosol being suspended in the air within the channel. Advantageously, whereas a jet stream of sanitisation fluid expelled onto a person, as in the prior art, does not expose a substantial proportion of a person’s external envelope to the sanitisation fluid, a disinfection solution in the form of a fog contacts all of, or at least substantially all of, an object’s external envelope when the object passes along the channel. The benefit of this is that all of, or at least a substantial proportion of, an object’s, in particular a person’s, external envelope is disinfected by way of the object, in particular the person, moving through the channel. Further advantageously, the above described arrangement of the present invention means that the object, in particular a person, is not required to stop within the channel in order to become sanitised. Moreover, due to the arrangement of the one or more solution atomisers, the channel remains completely, or at least substantially, occupied by the fog even as an object moves through the channel. Beneficially, this means that more than one object can be moving through the channel at any time and the external envelope of each object will be disinfected, or at least substantially disinfected. This further optimises the throughput of objects using the invention. As such, there is no requirement for a first object to move through the apparatus and exit the apparatus before a second object can enter the apparatus. In operation, an object, in particular a person, will continuously move, or walk, through the channel of the apparatus without stopping. Beneficially, this vastly decreases the time in which an object takes to become sanitised and, therefore, vastly increases the throughput of objects, in particular people, using the invention. This provides considerable commercial, economical and efficiency benefits over the aforementioned prior art. It is envisaged that a new object, for example a person, may enter the, or each, channel every two seconds, providing for a significant throughput of objects per hour. The one or more solution atomisers may comprise a nozzle having an orifice diameter of between about 0.05mm and 0.25mm, between about 0.10mm and 0.20mm, or about 0.15mm. Beneficially, a nozzle having an orifice diameter of about 0.15mm expels fluid as a mist. The one or more solution atomisers may comprise a nozzle having an orifice diameter of between about 0.005mm and 0.05mm, between about 0.01mm and 0.03mm, between about 0.015mm and 0.025mm, or about 0.02mm. Beneficially, a nozzle having an orifice diameter of about 0.02mm expels fluid as a mist. The system used to expel the disinfection solution may operate at between about 8 to 22 bar, between about 10 and 20 bar, between about 12 and 18 bar, between about 14 and 16 bar, or about 15 bar. The system used to expel the disinfection solution may operate at a pressure of between about 100 and 400 PSI, between about 150 and 350 PSI, between about 200 and 300 PSI, or about 250 PSI. Beneficially, where the system used to expel the disinfection solution operates at parameters or about 15 bar and 250 PSI, disinfection solution is expelled as a mist such that the channel is completely, or at least substantially, occupied by a fog of the disinfection solution when the apparatus is in use, and the apparatus made be made of materials which do not corrode upon prolonged contact with the disinfection solution. Such materials which are suitable for use in the apparatus may be plastics, for example, polypropylene, HDPE or PVC. The apparatus may comprise a means for counting, or recording, the number of users who enter the apparatus, and/or the time of day in which users enter the apparatus. Beneficially, this may facilitate the planning of maintenance to be carried out upon the apparatus, including, for example, electrical maintenance, cleaning of the apparatus or refilling the apparatus with disinfection solution or emptying the apparatus of expelled disinfection solution from a ‘waste’ tank. The apparatus may comprise a system used to pump the disinfection solution. The system used to pump the disinfection solution may be a diaphragm pump system. The one or more atomisers may be arranged to expel the disinfection solution at a flow rate of between about 0.30 and 1.80 litres per minute (l/min), between about 0.40 and 1.60 l/min, between about 0.50 and 1.50 l/min, between about 0.60 and 1.40 l/min, between about 0.70 and 1.30 l/min, between about 0.80 and 1.20 l/min, between about 0.90 and 1.10 l/min, or about 1.0 l/min. Beneficially, in an embodiment where the one or more atomisers expel the disinfection solution at a flow rate of about 1.0 l/min, a fog of disinfection solution is produced within the channel. In this regard, the fog, advantageously, does not render the object, in particular a person, who moves through the channel as wet with the disinfection solution. The one or more solution atomisers may comprise an in-line filter. Beneficially, the in-line filter prevents, or at least significantly reduces the possibility of, the one or more solution atomisers becoming blocked when in use. The channel may comprise a turn or bend. By this, we mean that the channel may be ‘L’-shaped or substantially ‘L’-shaped. This may be beneficial as a ‘wind- tunnel’ effect is not created, or is at least substantially mitigated, in a channel comprising a turn or bend; as may be created if the channel was completely straight from the point of entry to the point of exit. However, where the apparatus is used indoors, i.e. not exposed to wind effects, or in embodiments where the apparatus comprises a means of enclosing the disinfection solution fog within the channel, the channel does not need to comprise a turn or bend in order to prevent, or substantially mitigate, a wind tunnel effect. Advantageously, in an embodiment where the channel comprises a turn or a bend, a fog of disinfection solution within the channel does not get displaced (i.e. blown out of) out of the channel by wind and, therefore, the channel remains occupied, or at least substantially occupied, by the fog of the disinfection solution when in use. The turn or bend may be at an angle of between about 45-135°, between about 55-125°, between about 65-115°, between about 75-105°, between about 80-100°, or about 90°. The channel may comprise a first portion and a second portion. The first portion of the channel may be arranged to allow a user who enters the channel to move in a first direction. The second portion of the channel may be arranged to allow the user who enter the channel to move in a second direction. The second portion may be at an angle relative to the first portion. The angle may be between about 45-135°, between about 55-125°, between about 65-115°, between about 75-105°, between about 80-100°, or about 90°. The apparatus may comprise a means of enclosing the disinfection solution fog within the channel. Beneficially, the means of enclosing the disinfection solution fog within the channel ensures that the fog of disinfection solution is retained within the channel even in unfavourable weather conditions, for example strong wind. The means of enclosing the disinfection solution fog within the channel may be formed integral with the apparatus, or may be a separate component attachable to the apparatus when required for use. The means of enclosing the disinfection solution fog within the channel may be one or more air curtains and/or one or more fan systems. The apparatus may comprise at least one air curtain positioned at, or close to, the entry and/or exit of each channel and/or walkway. The apparatus may comprise an air curtain at the point of entry to the channel and/or walkway, and a corresponding air curtain at the point of exit of each channel and/or walkway. Each air curtain aerodynamically interferes with its corresponding air curtain such that the fog of disinfection solution is retained between the air curtains, i.e. within each channel and/or walkway. Advantageously, the air curtain(s) ensure that the fog of disinfection solution, which occupies the channel in use, does not get displaced from the channel by strong wind conditions and, therefore, the channel remains occupied, or at least substantially occupied, by the fog of the disinfection solution when in use. Further advantageously, the air curtain(s), by preventing the fog of disinfection solution being displaced from the channel, ensure that the fog of disinfection solution, or at least substantial amounts of the fog of disinfection solution, does not settle on floors external to the apparatus, damage finishes of furniture or upholstery or similar proximal to the apparatus, or cause surfaces to become slippery which may lead to an increased risk of accidents occurring. As such, the apparatus is particularly suitable for use within a building, for example within the entrance or foyer of a building such as a hotel, hospital or office block building, or in the foyer of a theatre or other place of public gathering. Further advantageously, the air curtain(s) allows the length of the or each channel to be reduced, such that the channels remain effective in disinfecting, or at least substantially disinfecting, an object moving through the or each channel even where the channels do not run the full length of the apparatus, for example where the or each channel may run across the apparatus (from longitudinal side to longitudinal side). Beneficially, where the or each channel(s) runs from longitudinal side to longitudinal side of the apparatus, the apparatus may comprise multiple channels, including single lane, dual lane, triple lane and multi-lane variants, compared to an apparatus where the or each channel run the full length of the apparatus. The floor of the walkway directly below each air curtain may comprise a grill to allow passage of air expelled by each air curtain in order to normalise air flow and allow for predictable air flow behaviour and adjustment of the air flow (Vanes), if required. The, or each, air curtain may be provided with air from a region remote to the entry and/or exit of the or each channel and/or walkway. Beneficially, this reduces the possibility of the fog of disinfection solution entering any electrical components, for example fan motors, which may be present and which may be vulnerable to corrosion from prolonged exposure to the disinfection solution. The or each air curtain may be a combination of plenums and air baffles. The air may be fed to the or each air curtain from remote fans via air ducts. It will be understood that the above features relating to the air curtain(s) are equally applicable to the one or more fan systems, if present. The channel may comprise a non-slip floor. The channel may comprise one or more drainage points. The one or more drainage points may be one or more drainage holes in the floor of the apparatus. The apparatus may comprise an integrated drainage system. The integrated drainage system may comprise a gutter running down each side of the or each walkway, adjacent to the walkway floor. The integrated drainage system may comprise a tray, upon which all of the apparatus is erected, to ensure that all, or at least a substantial amount of, disinfection solution fog which settles on any surface(s) (for example interior walls) of the apparatus is retained and then pumped to a waste tank to avoid disinfection solution damaging the flooring within the building. The waste tank may be integral to the apparatus. An integrated drainage system of this type is particularly beneficial when the apparatus is to be used in a building, for example in the entrance or foyer of a building, such as a hotel, hospital or office block building, or in the foyer of a theatre or other place of public gathering. The floor of each walkway may comprise a slight curve toward each peripheral edge of the floor. Each walkway may comprise a gutter running down each side of the or each walkway, adjacent to the walkway floor. Beneficially, the curved walkway and gutter(s) causes any external liquid deposited within the channel (for example, rain water dripping off the object), or any disinfection solution fog which has settled upon walls or floor of the channel, to collect in the gutter(s) and be drained out of the apparatus. Advantageously, this significantly reduces the possibility of the object slipping upon the walkway. The apparatus may comprise a front wall and a rear wall, the front wall and rear wall being joined by a first side wall, a second side wall, a top wall and a bottom wall. The walls of the apparatus may be arranged to define an enclosure. The apparatus may comprise a first door. The apparatus may comprise a second door. The front wall may comprise the first door. The first side wall may comprise the second door. The second side wall may comprise the second door. The first side wall and the second side wall may each comprise a door. The first door and/or the second door may be closable with security shutters. The apparatus may comprise a first window. The apparatus may comprise a second window. The rear wall may comprise the first window. The first side wall or the second side wall may comprise the first window. The top wall may comprise the first window. The first side wall or the second side wall may comprise the second window. The first window and/or the second window may be visible from the channel. Beneficially, this can be useful to reduce any feelings of claustrophobia which a person may experience when in the channel. The first window and/or the second window may be coverable with security shutters. The apparatus may comprise more than one channel, for example but not limited to, two, three or four channels. The or each channel may comprise more than one walkway. The channel may comprise two walkways. The walkways may be separated by a partitioning wall. Each walkway may be accessible via a first door. A first walkway may connect the first door to a second door. A second walkway may connect the first door to a third door. The first side wall may comprise the second door. The second side wall may comprise the third door. Each walkway may comprise a turn or a bend. The turn or bend may be at an angle between about 45-135°, between about 55-125°, between about 65-115°, between about 75-105°, between about 80-100°, or about 90°. Each walkway may be ‘L’-shaped or substantially ‘L’-shaped. The channel may comprise at least one walkway orientated diagonally with respect to a floor of the apparatus. It is envisaged that a walkway orientated diagonally within the apparatus runs from a longitudinally side of the apparatus to an opposite longitudinal side of the apparatus. However, walkways orientated diagonally within the apparatus may run from a transverse side of the apparatus to an opposite transverse side of the apparatus. Beneficially, walkways running diagonally across the apparatus allows the integration of more walkways into each apparatus, compared to an apparatus comprising walkways orientated lengthwise along the apparatus, or ‘L’-shaped walkways. It is envisaged that an apparatus may comprise a channel having three diagonally orientated walkways, each walkway being separated by a partitioning wall. The channel may comprise more than one walkway, for example, three walkways, orientated diagonally with respect to a floor of the apparatus. Each walkway may be separated by a partitioning wall. Where the apparatus comprises multiple walkways, each walkway may have its own entry and exit doors. The disinfection solution may have a conductivity of between about 850 and 1050 µS/cm, between about 900 and 1000 µS/cm, between about 925 and 975 µS/cm, or about 950 µS/cm. The disinfection solution may comprise hypochlorous acid. The disinfection solution may be stabilised hypochlorous acid. The disinfection solution may be an aqueous solution of hypochlorous acid. The disinfection solution may comprise zinc chloride. The disinfection solution may comprise copper chloride. The disinfection solution may comprise calcium oxide. The disinfection solution may comprise hypochlorous acid at a concentration of between about 0.020 and 0.050 w/v%, between about 0.025 and 0.045 w/v%, between about 0.027 and 0.040 w/v%, between about 0.028 and 0.035 w/v%, between about 0.030 and 0.033 w/v%, or about 0.032 w/v%. The disinfection solution may comprise zinc chloride at a concentration of between about 0.001 and 0.007 w/v%, between about 0.002 and 0.006 w/v%, between about 0.003 and 0.005 w/v%, or about 0.004 w/v%. The disinfection solution may comprise copper chloride at a concentration of between about 0.001 and 0.007 w/v%, between about 0.002 and 0.006 w/v%, between about 0.003 and 0.005 w/v%, or about 0.004 w/v%. The disinfection solution may comprise calcium oxide at a concentration of between about 0.003 and 0.010 w/v%, between about 0.004 and 0.008 w/v%, between about 0.005 and 0.007 w/v%, or about 0.006 w/v%. The apparatus may comprise at least one thermal imaging device. The at least one thermal imagining device may be a thermal imaging camera. The thermal imaging camera may be a fever detection camera. The at least one thermal imaging device may be positioned adjacent to the first door and/or adjacent to the second door. The at least one thermal imaging device may be positioned adjacent to a third door. The apparatus may comprise a first thermal imaging device positioned on an exterior wall of the apparatus adjacent to the first door, and a second thermal imaging device positioned on an exterior wall of the apparatus adjacent to the second door. The apparatus may comprise a third thermal imaging device positioned on an exterior wall of the apparatus adjacent to a third door. The at least one thermal imaging device may be arranged to detect the temperature of the object before the object enters the apparatus. In an embodiment where the object is a person, the at least one thermal imaging device may be arranged to detect the body temperature of the person. The apparatus may comprise a signalling system to indicate when the object has an acceptable temperature and when the object does not have an acceptable temperature. In an embodiment where the object is a person, the apparatus may comprise a signalling system to indicate when the thermal imaging device detects a body temperature of 38.0 °C or lower. In an embodiment where the object is a person, the apparatus may comprise a signalling system to indicate when the thermal imaging device detects a body temperature of 38.1 °C or higher. The signally system may be a lighting system. For example, a green light may be displayed when the thermal imaging device detects a person’s body temperature of 38.0 °C or lower and/or a red light may be displayed when the thermal imaging device detects a person’s body temperature of 38.1 °C or higher. The apparatus may comprise at least one radar-based detector. The at least one radar-based detector may be positioned on an exterior wall of the apparatus adjacent to the first door or adjacent to the second door or, where the apparatus does not comprise any doors, adjacent to the point of entrance and/or exit to the apparatus. The at least one radar-based detector may be positioned on an exterior wall of the apparatus adjacent to a third door. The apparatus may comprise a first radar-based detector positioned adjacent to the first door, and a second radar-based detector positioned adjacent to the second door. The apparatus may comprise a radar-based detector positioned adjacent to the point of entrance to the apparatus. The apparatus may comprise a radar-based detector positioned adjacent to the point of exit of the apparatus. The apparatus may comprise a radar-based detector positioned adjacent to a third door. In embodiments of the invention where the apparatus comprises multiple channels and/or walkways, each channel and/or walkway may be provided with its own radar-based detector positioned adjacent to the point of entrance and/or point of exit to that channel and/or walkway. The at least one radar-based detector may be arranged to detect when an object, in particular a person, is within a predetermined distance of the at least one radar-based detector. The predetermined distance may be between 1 and 5 metres. The predetermined distance may be 5 metres. Beneficially, this means that the apparatus can be put in a ‘stand-by’ mode to save power and disinfection solution until the radar- based detector detects an object within a predetermined distance at which point the apparatus will automatically switch on and expel a fog of disinfection solution into the channel(s) and/or walkways(s). A radar-based detector may find particular benefit in use with embodiments of the apparatus comprising multiple walkways or channels where not all channels(s) and/or walkways(s) are in constant use, so individual channel(s) or walkway(s) can be in a ‘stand-by’ mode and can then ‘fog-up’ as an object, in particular a person, approaches that particular channel and/or walkway. The apparatus may comprise at least one photo electric sensor. The at least one photo electric sensor may be positioned on an exterior wall of the apparatus adjacent to the first door or adjacent to the second door or, where the apparatus does not comprise any doors, adjacent to the entrance and/or exit point to the apparatus. The at least one photo electric sensor may be positioned on an exterior wall of the apparatus adjacent to a third door. The apparatus may comprise a first photo electric sensor positioned adjacent to the first door, and a second photo electric sensor positioned adjacent to the second door. The apparatus may comprise a third photo electric sensor positioned adjacent to a third door. The at least one photo electric sensor may be arranged to detect when an object, in particular a person, is within a predetermined distance of the at least one photo electric sensor. The predetermined distance may be between 1 and 5 metres. The predetermined distance may be 5 metres. Beneficially, this means that the apparatus may be put in a ‘stand-by’ mode to save power until the photo electric sensor detects an object within a predetermined distance at which point the apparatus will automatically switch on. The apparatus may be capable of autonomous operation via radar-based detector or via a photo electric sensor. The apparatus may be controlled by an operator by means of a linked tablet or similar means. The apparatus may comprise a service room. Access to the service room may be permitted via a service door. An interior first side wall may comprise the service door. This has the advantage that a service room integrated within the apparatus provides greater security of any components housed within the service room. A service room may comprise a disinfection solution pump. The disinfection solution pump may be for pumping disinfection solution from a store of disinfection solution to the one or more solution dispensing frames and thus to the one or more solution atomisers. The disinfection solution pump may operate in a ‘continuous mode’ or in a ‘pulse mode’. A service room may comprise a compressor. The compressor may be for pressurising and transporting the disinfection solution to the one or more solution dispensing frames and thus to the one or more solution atomisers. A service room may comprise a disinfection solution quality control sensor. The disinfection solution quality control sensor may be for measuring the concentration of hypochlorous acid in the disinfection solution. A service room may comprise a disinfection solution conductivity sensor. The disinfection solution conductivity sensor may be for measuring the conductivity of the disinfection solution. The conductivity of the disinfection solution may be measured before the disinfection solution is pumped to the one or more solution dispensing frames. A service room may comprise a disinfection solution flow rate sensor. The disinfection solution flow rate sensor may be for measuring the flow rate of the disinfection solution. A service room may comprise a control unit. The control unit may be for controlling one, more or each of the disinfection solution pump; compressor; disinfection solution quality control sensor; disinfection solution conductivity sensor; and disinfection solution flow rate sensor. For example, the control unit can be used to control the volume of disinfection solution pumped to the one or more solution dispensing frames. The apparatus may comprise a disinfection solution storage tank. The disinfection solution storage tank may be for storing disinfection solution before use. The service room may comprise the disinfection solution storage tank. The apparatus may comprise one or more connection means arranged such that the apparatus may be lifted onto a vehicle for transportation. The apparatus may be a modified shipping container. This has the benefit that the apparatus can be positioned at a location without the need for extensive groundwork, foundation structure, piling, etc. The apparatus may be a skeleton frame construction. The skeleton frame construction may be formed of multiple, easily transportable parts which together are fabricated to form the apparatus. Beneficially, this allows openings, for example entry and exit points to the channel(s), to be formed wherever is required within the apparatus, whilst allowing the apparatus to be transportable and/or lifted by Hiab or similar. The apparatus may be constructed from a number of individual panels and a tray upon which the panels are assembled. The individual panels and tray may be formed of a lightweight material, for example a rigid plastics material or a lightweight metal such as stainless steel or aluminium. The individual panels and tray may be purpose- designed for the apparatus. Advantageously, the individual panels and tray can be assembled to form the apparatus on-site, allowing the apparatus to be assembled in a building or other structure easily without recourse to a crane or Hiab. It is envisaged that the apparatus may be assembled within four hours. Further advantageously, individual panels are easily transportable between sites, effectively in the form of a ‘flat-pack’ arrangement. Each panel may relate to an interior first side wall, an interior second side wall or an interior top wall of the apparatus. The tray may relate to an interior bottom wall (i.e. floor) of the apparatus. The panels and tray may comprise each of the features required to put the invention into effect. For example, the panels forming each side wall and the top wall may be fitted with one or more solution dispensing frames arranged to expel disinfection solution into the channel; the channel being formed upon assembly of the apparatus. The apparatus may comprise a removable trolly (also known as a ‘dolly’ or a ‘bogey’) for means of holding a container of disinfection solution to be used to refill the apparatus with disinfection solution, and/or means of holding a container capable of being filled with used disinfection solution. The used disinfection solution may be collected by an integrated drainage system of the apparatus. According to a second aspect of the invention, there is provided a disinfection solution comprising hypochlorous acid for use in an apparatus for sanitising an object. The disinfection solution and the apparatus of the second aspect of the invention may, as appropriate, include any or all of the features described in relation to the first aspect of the invention. According to a third aspect of the invention, there is provided a use of a disinfection solution comprising hypochlorous acid in an apparatus according to the first aspect of the invention. The disinfection solution and the apparatus of the third aspect of the invention may, as appropriate, include any or all of the features described in relation to the first aspect of the invention. According to a fourth aspect of the invention, there is provided a method of sanitising an individual using an apparatus comprising a channel, the channel comprising one or more disinfection solution atomisers arranged to expel a mist of a disinfection solution such that, in use, a fog of disinfection solution occupies all of, or substantially all of, the channel, the method comprising the steps of: a. expelling the mist of disinfection solution into the channel; b. moving the individual into the apparatus via a point of entrance, moving the individual through the channel, and moving the individual out of the apparatus via a point of exit. The disinfection solution and the apparatus of the fourth aspect of the invention may, as appropriate, include any or all of the features described in relation to the first aspect of the invention. According to a fifth aspect of the invention, there is provided a system for sanitising an object with a disinfection solution, the system comprising one or more transportable apparatus, the or each apparatus comprising a channel through which an object can move, and a master unit comprising a control unit for controlling the or each transportable apparatus. The system may comprise six transportable apparatus. The channel may be separated into two or more walkways along which an object can move. The channel may be separated by a partitioning wall. The or each transportable apparatus may comprise two walkways. The channel may be defined by a first side wall, a second side wall, a top wall and a bottom wall. The or each channel may comprise a first door. The or each channel may comprise a first door and a second door. The first door may permit an object to enter the channel. The second door may permit an object to exit the channel. In an embodiment where the channel is separated into two or more walkways, each walkway may be defined by an interior side wall, a partitioning wall, a top wall and a bottom wall. The channel may comprise one or more disinfection solution atomisers. One or more solution dispensing frames may comprise the one or more disinfection solution atomisers. The or each walkway may comprise three solution dispensing frames. The or each solution dispensing frames may arch over any number of walkways within the channel. The one or more solution dispensing frames may be 3D-solution dispensing frames. The one or more solution dispensing frames may be substantially n-shaped such that the, or each, solution dispensing frame is affixed to the first side wall of the channel, the second side wall of the channel and the top wall of the channel. The one or more solution atomisers may be arranged to expel the disinfection solution as a mist. The one or more solution atomisers may be arranged to expel the disinfection solution as a mist such that the or each channel is completely, or at least substantially, occupied by a fog of the disinfection solution. The system may comprise one or more conduits extending from the master unit to the or each transportable apparatus. The one or more conduits may provide the or each transportable apparatus with a supply of electricity and/or disinfection solution. The master unit may be transportable. The or each of the transportable apparatus may be a modified shipping container. The master unit may be a modified shipping container. The benefit of the system according to the fifth aspect of the invention is that the or each transportable apparatus can be of a far simpler design, without requiring a separate service room for the or each transportable apparatus. This is because all of the services provided by the possible components of the service room, as described above, are provided from a central location, i.e. from the master (central) unit. The disinfection solution and the apparatus of the fifth aspect of the invention may, as appropriate, include any or all of the features described in relation to the first aspect of the invention. According to a sixth aspect of the invention, there is provided a kit of parts comprising a first side wall, a second side wall, a top wall and a bottom wall, for use in assembling the transportable apparatus of the broad aspect of the present invention, or the transportable apparatus of the first aspect of the present invention. One or more wall may comprise a disinfection solution dispensing frame, or part of a disinfection solution dispensing frame. A person skilled in the art will appreciate that any feature of any aspect of the present invention may be combined with any feature or combination of features of any other aspect of the present invention. Detailed Description of the Invention In order that the invention may be more clearly understood one or more embodiments thereof will now be described, by way of example only, with reference to the accompanying drawings, of which: Figure 1 shows a perspective view of the transportable apparatus according to an embodiment of the present invention; Figure 2 shows an alternate perspective view of the apparatus of Fig. 1; Figure 3 shows a further alternate perspective view of the apparatus of Fig. 1; Figure 4 shows a side view of the apparatus of Fig. 1; Figure 5 shows a side view of the apparatus of Fig. 1; Figure 6 shows a front view of the apparatus of Fig. 1; Figure 7 shows a rear view of the apparatus of Fig. 1; Figure 8 shows a plan view of the apparatus of Fig. 1; Figure 9 shows a sectional plan view of the apparatus of Fig. 1; Figure 10 shows a sectional side view of the apparatus of Fig. 1; Figure 11 shows a sectional front view of the apparatus of Fig. 1; Figure 12 shows a schematic of a system according to the present invention; Figure 13 shows a perspective view of the transportable apparatus according to an embodiment of the present invention; Figure 14 shows an alternate perspective view of the apparatus of Fig. 13; Figure 15 shows a further alternate perspective view of the apparatus of Fig. 1; Figure 16 shows a side view of the apparatus of Fig. 13; Figure 17 shows a side view of the apparatus of Fig. 13; Figure 18 shows a front view of the apparatus of Fig. 13; Figure 19 shows a rear view of the apparatus of Fig. 13; Figure 20 shows a plan view of the apparatus of Fig. 13; Figure 21 shows a sectional plan view of the apparatus of Fig. 13; Figure 22 shows a sectional side view of the apparatus of Fig. 13; Figure 23 shows a sectional front view of the apparatus of Fig. 13; Figure 24 shows a plan view of an alternate embodiment of the present invention; Figure 25 shows a sectional view of the apparatus of Fig. 24; Figure 26 shows a plan view of the apparatus of Fig. 24 including an object; Figure 27 shows a front view of the apparatus of Fig. 26; Figure 28 shows a plan view of an alternate embodiment of the present invention; Figure 29 shows a front view of the apparatus of Fig. 28; Figure 30 shows a sectional view of view B-B as shown in Fig. 29; Figure 31 shows a side view of the apparatus of Fig. 28; Figure 32 shows a sectional view of A-A as shown in Fig. 31; and Figure 33 shows a perspective image of the apparatus of Fig. 28. Figures 1 to 11 show, according to an embodiment of the present invention, a transportable apparatus 1 for sanitising an object (not shown) with a disinfection solution (not shown). The disinfection solution comprises water at 99.954 w/v%, hypochlorous acid at 0.032 w/v%, zinc chloride at 0.004 w/v%, copper chloride at 0.004 w/v% and calcium oxide at 0.006 w/v%. The disinfection solution has a conductivity of 950 µS/cm, a density of 0.997 gm/cm ³ , a pH of < 5.2 and a boiling point of 100°C. The apparatus 1 comprises a front wall 2, a rear wall 3, a first side wall 4, a second side wall 5, a top wall 6 and a bottom wall 7. In this embodiment, the apparatus 1 is a modified shipping container. The front wall 2 comprises a first door 8. The first door 8 permits an object to enter the apparatus 1. The first door 8 may also permit an object within the apparatus 1 to exit the apparatus 1. The first side wall 4 comprises a second door 9. The second door 9 permits an object within the apparatus 1, for example an object which has entered the apparatus 1 via the first door 8, to exit the apparatus 1. The second door 9 also permits an object to enter the apparatus 1. The front wall 2 comprises a thermal imaging device 12a. In this embodiment, the thermal imaging device is a thermal imaging camera 12a. The thermal imaging camera 12a is positioned adjacent to the first door 8. The positioning of the thermal imaging camera 12a is such that the camera 12a can measure the temperature of an object that has approached the apparatus 1. In particular, and as is envisaged in the present embodiment, the thermal imaging camera 12a is arranged to measure the body temperature of a person who has approached the apparatus 1. The first side wall 4 comprises a second thermal imaging device 12b. In this embodiment, the thermal imaging device is a thermal imaging camera 12b. The thermal imaging camera 12b is positioned adjacent to the second door 9. The positioning of the thermal imaging camera 12b is such that the camera 12b can measure the temperature of an object that has approached the apparatus 1. In particular, and as is envisaged in the present embodiment, the thermal imaging camera 12b is arranged to measure the body temperature of a person who has approached the apparatus 1. In the present embodiment, the thermal imaging camera 12b is arranged to detect whether the body temperature of the person is equal to or less than 38.0 °C or equal to or greater than 38.1 °C. The front wall 2 comprises a photo electric sensor 13a. The photo electric sensor 13a is positioned adjacent to the first door 8. The positioning of the photo electric sensor 13a is such that the sensor 13a can detect when an object has approached the apparatus 1 within a predetermined distance of the sensor 13a. The first side wall 4 comprises a photo electric sensor 13b. The photo electric sensor 13b is positioned adjacent to the second door 9. The positioning of the photo electric sensor 13b is such that the sensor 13b can detect when an object has approached the apparatus 1 within a predetermined distance of the sensor 13b. The first and second photo electric sensors 13a, 13b allow the apparatus 1 to be in a power down ‘stand by’ mode when the apparatus is in use but when an object is not within the predetermined distance from the apparatus 1. The front wall 2 comprises an entrance indicator 14a. The entrance indicator 14a is positioned adjacent to the first door 8. The entrance indicator 14a is arranged to display a visual indication as to the object’s suitable to enter the apparatus 1. In the present embodiment, the visual indication is in the form of a green light or a red light, determined by whether the person’s body temperature is equal to or less than 38.0 °C (green light) or equal to or greater than 38.1 °C (red light). The rear wall 3 comprises a window 10. The second side wall 5 comprises a window 11. Each window 10, 11 improves the aesthetics of the apparatus 1 and also reduces any feeling of claustrophobia which a person may feel inside the apparatus 1. The apparatus 1 comprises a channel 16. The channel 16 is defined by an interior front wall 20, an interior rear wall 30, an interior first side wall 40, an interior second side wall 50, an interior top wall 60 and an interior bottom wall 70. The channel 16 connects the first door 8 to the second door 9. The channel 16 is an ‘L’-shaped channel. The channel 16 is divided into two portions. A first portion 17a of the channel 16 permits movement of an object within the channel 16, and therefore within the apparatus 1, in a first direction. A second portion 17b of the channel 16 permits movement of an object within the channel 16, and therefore within the apparatus 1, in a second direction. The second portion 17b of the channel 16 is at an angle of 90° relative to the first portion 17a of the channel 16. The channel 16 comprises three solution dispensing frames; a first solution dispensing frame 19a, a second solution dispensing frame 19b and a third solution dispensing frame 19c. Each solution dispensing frame 19a, 19b, 19c is n- shaped. That is to say that a portion of each solution dispensing frame 19a, 19b, 19c is affixed to the interior first side wall 40, a portion of each solution dispensing frame 19a, 19b, 19c is affixed to the interior top wall 60, and a portion of each solution dispensing frame 19a, 19b, 19c is affixed to the interior second side wall 50. Each solution dispensing frame 19a, 19b, 19c comprises nine solution atomisers 19a1, 19a2, 19a3, 19b1, 19b2, 19b3, 19c1, 19c2,19c3 (for clarity not all atomisers are shown in the Figures). Each solution atomiser 19a1, 19a2, 19a3, 19b1, 19b2, 19b3, 19c1, 19c2,19c3 comprises a nozzle having an orifice diameter of 0.15mm. The solution atomisers 19a1, 19a2, 19a3, 19b1, 19b2, 19b3, 19c1, 19c2,19c3 are arranged at regular intervals along each respective solution dispensing frame 19a, 19b, 19c. The solution atomisers 19a1, 19a2, 19a3, 19b1, 19b2, 19b3, 19c1, 19c2,19c3 expel disinfection solution at a flow rate of 1.0 l/min. Each solution atomiser 19a1, 19a2, 19a3, 19b1, 19b2, 19b3, 19c1, 19c2,19c3 expels disinfection solution as a mist, therefore, forming a fog of the disinfection solution within the channel. The arrangement of the apparatus 1, in particular the arrangement of the atomisers 19a1, 19a2, 19a3, 19b1, 19b2, 19b3, 19c1, 19c2,19c3, the solution dispensing frames 19a, 19b, 19c, the flow rate of the disinfection solution and the orifice diameter of each nozzle, means that a fog of disinfection solution is produced within the channel 16. The fog of disinfection solution occupies all of the channel 16. This has the benefit that the greatest amount as is possible of the external envelope of an object moving through the channel 16 is contacted, and, therefore, disinfected (sanitised) by the disinfection solution. The apparatus 1 comprises a service room 18. Access to the service room 18 is permitted via a service door 15. The interior first side wall 40 comprises the service door 15. The service room 18 comprises a disinfection solution pump (not shown) for pumping disinfection solution from a store of disinfection solution (not shown) to each of the solution dispensing frames 19a, 19b, 19c and thus to each of the solution atomisers 19a1, 19a2, 19a3, 19b1, 19b2, 19b3, 19c1, 19c2,19c3. The service room comprises a compressor (not shown) for pressurising and transporting the disinfection solution to each of the solution dispensing frames 19a, 19b, 19c and thus to the one or more solution atomisers 19a1, 19a2, 19a3, 19b1, 19b2, 19b3, 19c1, 19c2,19c3. The service room comprises a disinfection solution quality control sensor (not shown) for measuring the concentration of hypochlorous acid in the disinfection solution. The service room comprises a disinfection solution conductivity sensor (not shown) for measuring the conductivity of the disinfection solution. The service room comprises a disinfection solution flow rate sensor (not shown) for measuring the flow rate of the disinfection solution. The service room comprises a control unit (not shown) for controlling each of the disinfection solution pump; compressor; disinfection solution quality control sensor; disinfection solution conductivity sensor; and disinfection solution flow rate sensor. The service room comprises a disinfection solution storage tank (not shown). However, it is envisaged that the disinfection solution storage tank may also be provided as a container separate to the apparatus 1; the disinfection solution being pumped into the apparatus a via a conduit and the disinfection solution pump. In operation, and in this particular embodiment where the object is a person, it is envisaged that the person approaches the first door 8 of the apparatus 1, the person being detectable by the photo electric sensor 13a, thereby switching the apparatus 1 from a ‘stand by’ mode to an ‘on’ mode. Switching to the ‘on’ mode, triggers the control unit to activate the disinfection solution pump and compressor, and disinfection solution is pumped from a disinfection solution storage tank to each of the solution dispensing frames 19a, 19b, 19c and out of the respective atomisers 19a1, 19a2, 19a3, 19b1, 19b2, 19b3, 19c1, 19c2,19c3 in the form of a mist. The channel 16 becomes occupied with a fog of disinfection solution. The thermal imaging camera 12a detects the body temperature of the person and, providing the person has a body temperature of 38.0 °C or lower, the first entrance indicator 14a displays a green light and the person is permitted to enter the apparatus 1 via the first door 8. As the person moves through the first door 8, the person enters the first portion 17a of the channel 16. Without stopping, the person moves through the first portion 17a of the channel 16, through the second portion 17b of the channel 16, and exits the apparatus 1 via door 9. All of, or at least a substantial proportion of, the person’s external envelope is now disinfected. It is envisaged that the present invention has a throughput of between 1500 and 2000 people per hour. Figure 12 shows, according to an embodiment of the invention, a system 28 comprising a master unit 20 and six transportable apparatus 24a, 24b, 24c, 24d, 24e, 24f for sanitising an object (not shown) with a disinfection solution (not shown). The master unit 20 comprises a service module 21 and a control module 22. The service module 21 comprises a disinfection solution pump, a compressor, a disinfection solution quality control sensor, a disinfection solution conductivity sensor and a disinfection solution flow rate sensor. The control module 22 comprises a control unit for controlling the aforementioned components housed within the service module 21. The system 28 comprises a first conduit 23a connected to the master unit 20 and to each of the apparatus 24a, 24b and 24c. The system 28 comprises a second conduit 23b connected to the master unit 20 and to each of the apparatus 24d, 24e and 24f. Each conduit 23a, 23b provides its respective apparatus 24a, 24b, 24c and 24d, 24e and 24f with electrical power and a supply of disinfection solution. Each apparatus 24a, 24b, 24c, 24d, 24e, 24f comprises two first doors 25a1, 25a2, 25b1, 25b2, 25c1, 25c2, 25d1, 25d2, 25e1, 25e2, 25f1, 25f2 which permit access to a respective walkway 27a1, 27a2, 27b1, 27b2, 27c1, 27c2, 27d1, 27d2, 27e1, 27e2, 27f1, 27f2. Each apparatus 24a, 24b, 24c, 24d, 24e, 24f comprises two second doors 26a1, 26a2, 26b1, 26b2, 26c1, 26c2, 26d1, 26d2, 26e1, 26e2, 26f1, 26f2 which allow an object within the respective walkway 27a1, 27a2, 27b1, 27b2, 27c1, 27c2, 27d1, 27d2, 27e1, 27e2, 27f1, 27f2 to exit the respective apparatus 24a, 24b, 24c, 24d, 24e, 24f. The system 28 allows each apparatus 24a, 24b, 24c, 24d, 24e, 24f to be controlled from a central (master) unit 20. This includes the ability to increase/decrease the flow rate of disinfection solution, and to change the composition of the disinfection solution, to each apparatus 24a, 24b, 24c, 24d, 24e, 24f (i.e. by diluting/concentrating the solution). Figures 13 to 23 show, according to an embodiment of the invention, a transportable apparatus 24 for sanitising an object (not shown) with a disinfection solution (not shown). The apparatus 24 comprises a front wall 200, a rear wall 300, a first side wall 400, a second side wall 500, a top wall 600 and a bottom wall 700. In this embodiment, the apparatus 24 is a modified shipping container. The front wall 200 comprises a first door 80. The first door 80 permits an object to enter the apparatus 24. The first door 80 may also permit an object within the apparatus 24 to exit the apparatus 24. The first side wall 400 comprises a second door 90. The second door 90 permits an object within the apparatus 24, for example an object which has entered the apparatus 24 via the first door 80, to exit the apparatus 24. The second door 90 also permits an object to enter the apparatus 24. The second side wall 500 comprises a third door 95. The third door 95 permits an object within the apparatus 24, for example an object which has entered the apparatus 24 via the first door 80, to exit the apparatus 24. The third door 95 also permits an object to enter the apparatus 24. The front wall 200 comprises a thermal imaging device 120a. In this embodiment, the thermal imaging device is a thermal imaging camera 120a. The thermal imaging camera 120a is positioned adjacent to the first door 80. The positioning of the thermal imaging camera 120a is such that the camera 120a can measure the temperature of an object that has approached the apparatus 24. In particular, and as is envisaged in the present embodiment, the thermal imaging camera 120a is arranged to measure the body temperature of a person who has approached the apparatus 24. The first side wall 400 comprises a second thermal imaging device 120b. In this embodiment, the thermal imaging device is a thermal imaging camera 120b. The thermal imaging camera 120b is positioned adjacent to the second door 90. The positioning of the thermal imaging camera 120b is such that the camera 120b can measure the temperature of an object that has approached the apparatus 24. In particular, and as is envisaged in the present embodiment, the thermal imaging camera 120b is arranged to measure the body temperature of a person who has approached the apparatus 24. In the present embodiment, the thermal imaging camera 120b is arranged to detect whether the body temperature of the person is equal to or less than 38.0 °C or equal to or greater than 38.1 °C. The second side wall 500 comprises a third thermal imaging device 120c. In this embodiment, the thermal imaging device is a thermal imaging camera 120c. The thermal imaging camera 120c is positioned adjacent to the third door 95. The positioning of the thermal imaging camera 120c is such that the camera 120c can measure the temperature of an object that has approached the apparatus 24. In particular, and as is envisaged in the present embodiment, the thermal imaging camera 120c is arranged to measure the body temperature of a person who has approached the apparatus 24. In the present embodiment, the thermal imaging camera 120c is arranged to detect whether the body temperature of the person is equal to or less than 38.0 °C or equal to or greater than 38.1 °C. The front wall 200 comprises a photo electric sensor 130a. The photo electric sensor 130a is positioned adjacent to the first door 80. The positioning of the photo electric sensor 130a is such that the sensor 130a can detect when an object has approached the apparatus 24 within a predetermined distance of the sensor 130a. The first side wall 400 comprises a photo electric sensor 130b. The photo electric sensor 130b is positioned adjacent to the second door 90. The positioning of the photo electric sensor 130b is such that the sensor 130b can detect when an object has approached the apparatus 24 within a predetermined distance of the sensor 130b. The second side wall 500 comprises a photo electric sensor 130c. The photo electric sensor 130c is positioned adjacent to the second door 95. The positioning of the photo electric sensor 130c is such that the sensor 130c can detect when an object has approached the apparatus 24 within a predetermined distance of the sensor 130c. The first, second and third photo electric sensors 130a, 130b, 130c allow the apparatus 24 to be in a power down ‘stand by’ mode when the apparatus is in use but when an object is not within the predetermined distance from the apparatus 24. The front wall 200 comprises an entrance indicator 140a. The entrance indicator 140a is positioned adjacent to the first door 80. The entrance indicator 140a is arranged to display a visual indication as to the object’s suitability to enter the apparatus 24. In the present embodiment, the visual indication is in the form of a green light or a red light, determined by whether the person’s body temperature is equal to or less than 38.0 °C (green light) or equal to or greater than 38.1 °C (red light). The first side wall 400 comprises an entrance indicator 140b. The entrance indicator 140b is positioned adjacent to the second door 90. The entrance indicator 140b is arranged to display a visual indication as to the object’s suitability to enter the apparatus 24. In the present embodiment, the visual indication is in the form of a green light or a red light, determined by whether the person’s body temperature is equal to or less than 38.0 °C (green light) or equal to or greater than 38.1 °C (red light). The second side wall 500 comprises an entrance indicator 140c. The entrance indicator 140c is positioned adjacent to the third door 95. The entrance indicator 140c is arranged to display a visual indication as to the object’s suitability to enter the apparatus 24. In the present embodiment, the visual indication is in the form of a green light or a red light, determined by whether the person’s body temperature is equal to or less than 38.0 °C (green light) or equal to or greater than 38.1 °C (red light). The rear wall 300 comprises a window 100. The first side wall 400 comprises a window 115. The second side wall 500 comprises a window 110. Each window 100, 115, 110 improves the aesthetics of the apparatus 24 and also reduces any feeling of claustrophobia which a person may feel inside the apparatus 24. The apparatus 24 comprises two walkways 160, 165. Each walkway 160, 165 is accessible via the first door 80. The two walkways 160, 165 are separated by an interior partitioning wall 505. Each walkway 160, 165 is defined by an interior front wall 205, an interior rear wall 305, an interior first side wall 405, the interior partitioning wall 505, an interior top wall 605 and an interior bottom wall 705. Walkway 160 connects the first door 80 to the second door 90 and, therefore, allows an object, in the present embodiment, a person, to move from the first door 80 to the second door 90. Walkway 165 connects the first door 80 to the third door 95 and, therefore, allows an object, in the present embodiment, a person, to move from the first door 80 to the third door 95. Each walkway 160, 165 presents an ‘L’-shaped walkway. That is to say that each walkway 160, 165 is divided into two portions. A first portion 170a of the walkway 160 permits movement of an object within the walkway 160, and therefore within the apparatus 24, in a first direction. A second portion 170b of the walkway 160 permits movement of an object within the walkway 160, and therefore within the apparatus 24, in a second direction. The second portion 170b of the walkway 160 is at an angle of 90° relative to the first portion 170a of the walkway 160. A first portion 175a of the walkway 165 permits movement of an object within the walkway 165, and therefore within the apparatus 24, in a first direction. A second portion 175b of the walkway 165 permits movement of an object within the walkway 165, and therefore within the apparatus 24, in a second direction. The second portion 175b of the walkway 165 is at an angle of 90° relative to the first portion 175a of the walkway 165. The apparatus 24 comprises three solution dispensing frames; a first solution dispensing frame 190a, a second solution dispensing frame 190b and a third solution dispensing frame 190c. Each solution dispensing frame 190a, 190b, 190c is n-shaped. That is to say that a portion of each solution dispensing frame 190a, 190b, 190c is affixed to the interior first side wall 405, a portion of each solution dispensing frame 190a, 190b, 190c is affixed to the interior top wall 605, and a portion of each solution dispensing frame 190a, 190b, 190c is affixed to the interior second side wall 500. Each solution dispensing frame 190a, 190b, 190c is in the form of an arch which extends over each walkway 160, 165. Each solution dispensing frame 190a, 190b, 190c comprises nine solution atomisers 190a1, 190a2, 190a3, 190b1, 190b2, 190b3, 190c1, 190c2,190c3 (for clarity not all atomisers are shown in the Figures). Each solution atomiser 190a1, 190a2, 190a3, 190b1, 190b2, 190b3, 190c1, 190c2,190c3 comprises a nozzle having an orifice diameter of 0.15mm. The solution atomisers 190a1, 190a2, 190a3, 190b1, 190b2, 190b3, 190c1, 190c2,190c3 are arranged at regular intervals along each respective solution dispensing frame 190a, 190b, 190c. The solution atomisers 190a1, 190a2, 1900a3, 190b1, 190b2, 190b3, 190c1, 190c2,190c3 expel disinfection solution at a flow rate of 1.0 l/min. Each solution atomiser 190a1, 190a2, 190a3, 190b1, 190b2, 190b3, 190c1, 190c2,190c3 expels disinfection solution as a mist, therefore, forming a fog of the disinfection solution within the channel and, therefore, within each walkway 160, 165. The arrangement of the apparatus 24, in particular the arrangement of the atomisers 190a1, 190a2, 190a3, 190b1, 190b2, 190b3, 190c1, 190c2,190c3, the solution dispensing frames 190a, 190b, 190c, the flow rate of the disinfection solution and the orifice diameter of each nozzle, means that a fog of disinfection solution is produced within each walkway 160, 165. The fog of disinfection solution occupies all of each walkway 160, 165. This has the benefit that the greatest amount as is possible of the external envelope of an object moving through each walkway 160, 165 is contacted, and, therefore, disinfected (sanitised) by the disinfection solution. In this embodiment, the disinfection solution comprises water at 99.954 w/v%, hypochlorous acid at 0.032 w/v%, zinc chloride at 0.004 w/v%, copper chloride at 0.004 w/v% and calcium oxide at 0.006 w/v%. The disinfection solution has a conductivity of 950 µS/cm, a density of 0.997 gm/cm ³ , a pH of < 5.2 and a boiling point of 100°C. Each apparatus 24 receives a supply of electrical power and disinfection solution via conduit 23a, 23b (see Fig. 12) which stems from the central unit 20. Figures 24 to 27 show, according to an embodiment of the invention, a transportable apparatus 1000 for sanitising an object 250 with a disinfection solution (not shown). It should be noted that, whilst not shown in Figs.24 to 27, the arrangement of solution dispensing frames and atomisers with respect to each channel is the same in the embodiment of Figs. 24 to 27 as it is in the embodiment shown in Figs. 1 to 11. The apparatus 1000 comprises three channels 160 each separated by a partitioning wall 150. Each channel comprises a walkway for an object, in this embodiment, a person 250, to move along from an entry point of the apparatus to a corresponding exit point of the apparatus. As shown in Fig. 24, each channel 160 is orientated diagonally with respect to a floor 161 of the apparatus 1000. Each channel 160 comprises an entry point, for example a first door, and an exit point, for example a second door, as in the embodiment shown in Figs. 1 to 11. Each channel 160 is provided with an access/exit ramp 85. Each channel 160 comprises a floor 161 which is slightly curved towards its peripheral edges to allow for drainage of fluid into gutters 162. The apparatus 1000 comprises a means 180 of enclosing the disinfection solution fog within the channels 160 when in use. In the depicted embodiment, the means of enclosing the disinfection solution fog within each channel 160 is an air curtain 180. The air curtain 180 is arranged to expel a curtain of air at each entry and exit point to each channel 160 such that the disinfection solution fog is retained within each channel 160 in use, even during adverse weather conditions, for example strong winds or a storm. A grill (not shown) is located directly below each air curtain on the floor of each channel 160. The grills allow for through passage of air expelled from each air curtain 180 such that the expelled air does not deflect into each channel 160 and disturb the disinfection solution fog (if the grills were not present). The apparatus 1000 comprises two service rooms 18, each accessible via a service door 15. Each service room 18 comprises a disinfection solution pump (not shown) for pumping disinfection solution from a store of disinfection solution (not shown) to each of the solution dispensing frames (not shown in Figs. 24-27) and thus to each of the solution atomisers (not shown in Figs. 24-27).In this embodiment, the disinfection solution comprises water at 99.954 w/v%, hypochlorous acid at 0.032 w/v%, zinc chloride at 0.004 w/v%, copper chloride at 0.004 w/v% and calcium oxide at 0.006 w/v%. The disinfection solution has a conductivity of 950 µS/cm, a density of 0.997 gm/cm ³ , a pH of < 5.2 and a boiling point of 100°C. In this embodiment, each solution atomiser has a nozzle diameter of 0.02mm. Figures 28 to 33 show, according to an embodiment of the invention, a transportable apparatus 2000 for sanitising an object 250 with a disinfection solution (not shown). In the depicted embodiment, the object 250 is a person. The apparatus 2000 comprises a first side wall 4c, a second side wall 5c, a top wall 6c and a bottom wall 7c. The bottom wall 7c is the floor of the apparatus 2000 upon which object 250 moves through the apparatus 2000. The first side wall 4c, a second side wall 5c, a top wall 6c and a bottom wall 7c form a channel 160c. The channel 160c comprises a walkway (effectively the upper facing surface of bottom wall 7c) along which the object 250 moves. The channel 160c comprises a point of entrance 160c1 to the apparatus 2000 for object 250, and a point of exit 160c2 from the apparatus 2000 for object 250. The floor (bottom wall 7c) comprises a non-slip coating upon which object 250 moves. In this embodiment, the apparatus 2000 is absent of doors. As such, apparatus 2000 is particularly advantageous for use within a building, for example within the foyer of a building, such as a hotel, hospital or office block building, or in the foyer of a theatre or other place of public gathering. In this embodiment, the apparatus 2000 is assembled from a kit of parts comprising the first side wall 4c, second side wall 5c, top wall 6c and bottom wall 7c. Formed integral with the second side wall 5c, there is a waste tank 75 and a fresh tank 76. The waste tank 76 stores disinfection solution after it is expelled and is collected by an internal drainage system (not shown). The fresh tank 75 stores disinfection solution prior to being expelled. The disinfection solution comprises water at 99.954 w/v%, hypochlorous acid at 0.032 w/v%, zinc chloride at 0.004 w/v%, copper chloride at 0.004 w/v% and calcium oxide at 0.006 w/v%. The disinfection solution has a conductivity of 950 µS/cm, a density of 0.997 gm/cm ³ , a pH of < 5.2 and a boiling point of 100°C. The apparatus 2000 comprises a means of enclosing the disinfection solution fog within the channel 160c when in use. In the depicted embodiment, the means of enclosing the disinfection solution fog within channel 160c is an air curtain (not shown). The air curtain is arranged to expel a curtain of air at the point of entrance 160c1 and point of exit 160c2 of each channel 160c such that the disinfection solution fog is retained within each channel 160c in use, even if the apparatus 2000 is deployed in an outside environment where it may experience adverse weather conditions, for example strong winds or a storm. A radar-based detector (not shown) is positioned adjacent to the point of entrance 160c1. The radar-based detector is operable to detect when an object 250 is within a predetermined distance of the detector, for example within one to five metres, particularly 1 metre. As such, the apparatus 2000 may be in a power-saving stand-by mode until the radar-based detector detects an object 250. An entrance indicator (not shown) is positioned adjacent to the point of entrance 160c1. The entrance indicator is arranged to display a visual indication, such as a green light, when it is suitable for an object 250 to enter the apparatus 2000. The channel 160c comprises one solution dispensing frame formed of three parts 19ac, 19bc and 19cc. The solution dispensing frame 19ac, 19bc, 19cc is substantially n-shaped. That is to say that a portion of the solution dispensing frame 19ac, 19bc, 19cc is affixed to the interior of first side wall 4c, to the interior of top wall 6c, and to the interior of second side wall 5c. The solution dispensing frame 19ac, 19bc, 19cc comprises eight solution atomisers 19a1c, 19a2c, 19a3c, 19a4c, 19b1c, 19b2c, 19c1c, 19c2c. Each solution atomiser 19a1c, 19a2c, 19a3c, 19a4c, 19b1c, 19b2c, 19c1c, 19c2c comprises a nozzle having an orifice diameter of 0.02mm. The solution atomisers 19a1c, 19a2c, 19a3c, 19a4c, 19b1c, 19b2c, 19c1c, 19c2c are arranged at regular intervals along each respective solution dispensing frame 19ac, 19bc, 19cc. The solution atomisers 19a1c, 19a2c, 19a3c, 19a4c, 19b1c, 19b2c, 19c1c, 19c2c expel disinfection solution at a flow rate of 1.0 l/min. Each solution atomiser 19a1c, 19a2c, 19a3c, 19a4c, 19b1c, 19b2c, 19c1c, 19c2c expels disinfection solution as a mist, therefore, forming a fog of the disinfection solution within the channel 160c. The arrangement of the apparatus 2000, in particular the arrangement of the atomisers 19a1c, 19a2c, 19a3c, 19a4c, 19b1c, 19b2c, 19c1c, 19c2c, the solution dispensing frame 19ac, 19bc, 19cc, the flow rate of the disinfection solution and the orifice diameter of each nozzle, means that a fog of disinfection solution is produced within the channel 160c. The fog of disinfection solution occupies all of the channel 160c. This has the benefit that the greatest amount as is possible of the external envelope of an object 250 moving through the channel 160c is contacted, and, therefore, disinfected (sanitised) by the disinfection solution. The skilled person will appreciate that the abovementioned advantages and benefits associated with the first aspect of the invention, or any aspect of the invention, are shared with the corresponding features found in each of the other aspects of the invention described above. The one or more embodiments are described above by way of example only. Many variations are possible without departing from the scope of protection afforded by the appended claims.