“(3ZA) In relation to England, where- (a) two or more hereditaments (whether in the same building or otherwise) are occupied by the same person, … the hereditaments shall be treated as one hereditament. (3ZB) In relation to England, where- 5 (a) two or more hereditaments (whether in the same building or otherwise) are- (i) owned by the same person, and (ii) unoccupied, (b) the hereditaments- (i) ceased to be occupied on the same day, and (ii) have each remained unoccupied since that day, (c) immediately before that day, the hereditaments were, or formed part of, a single hereditament by virtue of subsection (3ZA), and (d) the hereditaments meet the contiguity condition (see subsection (3ZC)), the hereditaments shall be treated as one hereditament.”