‘(1) … where in any accounting period … a company carrying on a trade incurs a loss in the trade, then … the company may make a claim requiring that the loss be set off for the purposes of corporation tax against profits (of whatever description) (a) of that accounting period, and (b) if the company was then carrying on the trade and the claim so requires, of preceding accounting periods falling wholly or partly within the period specified in subsection (2) below; and, subject to that subsection and to any relief for an earlier loss, the profits of any of those accounting periods shall than be treated as reduced by the amount of the loss, or by so much of that amount as cannot be relieved under this subsection against profits of a later accounting period. (2) The period referred to in paragraph (b) of subsection (1) above is … the period of twelve months immediately preceding the accounting period in which the loss was incurred; but the amount of the reduction that may be made under that subsection in the profits of an accounting period falling partly before the beginning of that period shall not exceed a part of those profits proportionate to the part of the accounting period falling within that period. … (10) A claim under subsection (1) above may only be made within the period of two years immediately following the accounting period in which the loss is incurred or within such other period as the Board may allow.’
“Temporary Extension of Carry Back of Losses”
‘(2) This paragraph applies to any loss incurred by a company in a trade in a relevant accounting period (but subject to sub-paragraph (3)); and a relevant accounting period is one ending after23 November 2008 and before24 November 2010 . (3) The maximum amount of loss to which this paragraph applies in the case of any company is- (a)£50,000 in relation to losses incurred in relevant accounting periods ending after23 November 2008 and before24 November 2009 , and (b)£50,000 in relation to losses incurred in relevant accounting periods ending after23 November 2009 and before24 November 2010 , …’