Finance Act 1985

15 (1) If, in a case where sub-paragraph (5)(6) of paragraph 13 above applies, the increase in the qualifying expenditure is, in whole or in part, attributable to the cost of acquiring an option binding the grantor to sell (in this paragraph referred to as "the option consideration "), then, in addition to any increase under paragraph (a) or paragraph (b) of sub-paragraph (5) of paragraph 13 above, the indexed pool of expenditure shall be increased by an amount equal to the indexed rise in the option consideration, as determined under sub-paragraph (2) below.

(2) The indexed rise in the option consideration is a sum produced by multiplying the consideration by a figure expressed as a decimal and determined, subject to sub-paragraph (3) below, by the formula—

where—

• RO is the retail prices index for the month in which falls the date on which the option is exercised ; and

• RA is the retail prices index for the month in which falls the date in which the option was acquired or, if it is later, March 1982.

(3) If RO, as defined in sub-paragraph (2) above, is equal to or less than RA, as so defined, the indexed rise is nil.