3(1)This paragraph applies if—
(a)a company has a pool of field allowances for an accounting period (“accounting period 1”), and
(b)the company’s adjusted ring fence profits for accounting period 1 are reduced to nil in accordance with paragraph 1(2).
(2)A part of the company’s pool of field allowances for accounting period 1 is to be carried into the following accounting period (“accounting period 2”).
(3)The part to be carried into accounting period 2 is—
F - P
where—
F is the amount of the company’s pool of field allowances for accounting period 1, and
P is the amount of the adjusted ring fence profits for accounting period 1.