(1)The partner company's share in the firm's loss of a relevant accounting period may be deducted for the purposes of corporation tax relief only from its share in the profits of the trade carried on by the firm.
(2)For this purpose, qualifying charitable donations made by the firm in a relevant accounting period are to be treated as a loss of that period.
(3)Unless allowed under subsection (1)—
(a)a loss made in a trade may not be deducted for the purposes of corporation tax relief from the partner company's share in the firm's profits of a relevant accounting period, and
(b)if (ignoring this paragraph) any other amount could be used for the purposes of corporation tax relief, that amount may not be deducted for those purposes from the partner company's share in the firm's profits of a relevant accounting period.
(4)In this section a “relevant accounting period” is any accounting period of the firm in which arrangements within section 959 are in existence or to which any such arrangements apply.