“First, the primary test is, as I have said, geographical. It is based on visual or cartographic unity. Contiguous spaces will normally possess this characteristic, but unity is not simply a question of contiguity, as the second Bank of Scotland case illustrates. If adjoining houses in a terrace or vertically contiguous units in an office block do not intercommunicate and can be accessed only via other property (such as a public street or the common parts of the building) of which the common occupier is not in exclusive possession, this will be a strong indication that they are separate hereditaments. If direct communication were to be established, by piercing a door or a staircase, the occupier would usually be said to create a new and larger hereditament in place of the two which previously existed. Secondly, where in accordance with this principle two spaces are geographically distinct, a functional test may nevertheless enable them to be treated as a single hereditament, but only where the use of the one is necessary to the effectual enjoyment of the other. This last point may commonly be tested by asking whether the two sections could reasonably be let separately. Third, the question whether the use of one section is necessary to the effectual enjoyment of the other depends not on the business needs of the ratepayer but on the objectively ascertainable character of the subjects. The application of these principles cannot be a mere mechanical exercise. They will commonly call for a factual judgment on the part of the valuer and the exercise of a large measure of professional common sense. But in my opinion they correctly summarise the relevant law. They are also rationally founded on the nature of a tax on individual properties.”
“Furthermore, closer consideration suggests that, particularly in modern buildings, two consecutive floors are not actually contiguous to each other: there will often be a void between them, which contains servicing equipment and is in the possession and occupation of the landlord of the building. Absent a communicating internal staircase or lift, passing through the void, two consecutive floors in the same building would be physically separated in much the same way as two non-consecutive floors.”
“There were 8 respondents who were concerned that service voids within walls or between floors or ceilings might mean hereditaments would not be considered to be contiguous. Respondents felt this did not reflect the previous practice of the Valuation Office Agency. In light of these concerns, the Government has amended the Bill to make it clear that spaces in walls or ceilings do not prevent two properties in the same occupation being considered contiguous.”
“It was accepted that the ‘space’ between the Suite 10 and Suite 8 and 9 was a fire corridor; had there been no requirement for the fire corridor, then there would have been total interconnection between the two suites. The panel held that the fire corridor fell within the definition of the term ‘space’, which in accordance with the 2018 Act, did not prevent the two suites from being contiguous.”
“the Government has amended the Bill to make it clear that spaces in walls or ceilings do not prevent two properties in the same occupation being considered contiguous”