“2(1) The rateable value of a non-domestic hereditament none of which consists of domestic property and none of which is exempt from local non-domestic rating shall be taken to be an amount equal to the rent at which it is estimated the hereditament might reasonably be expected to let from year to year on these three assumptions: (a) the first assumption is that the tenancy begins on the day by reference to which the determination is to be made; (b) the second assumption is that immediately before the tenancy begins the hereditament is in a state of reasonable repair, but excluding from this assumption any repairs which a reasonable landlord would consider uneconomic; (c) the third assumption is that the tenant undertakes to pay all usual tenant’s rates and taxes and to bear the cost of the repairs and insurance and the other expenses (if any) necessary to maintain the hereditament in a state to command the rent mentioned above.”
“2(7)(d) Matters affecting the physical state of the locality in which the hereditament is situated or which, though not affecting the physical state of the locality, are nonetheless physically manifest there…”
“Where the rateable value is determined for the purposes of compiling a list the day by reference to which determination is to be made is – (a) the day on which the list must be compiled, or (b) such day preceding that day as may be specified by the Secretary of State by Order in relation to the list.”
“Subject to paragraphs (3) to (7), where an alteration is made to correct any inaccuracy in the list on or after the day it is compiled, the alteration shall have effect from the day on which the circumstances giving rise to the alteration first occurred.”