21(1)This paragraph applies where a company that does not qualify as a small or medium-sized enterprise in an accounting period is entitled to relief under this Schedule for that period.
(2)In so far as the company’s qualifying expenditure for that period is deductible in computing for tax purposes the profits for that period of a trade carried on by the company, it is entitled (on making a claim) to an additional deduction in computing the profits of the trade for that period of an amount equal to 50% of the qualifying expenditure.
(3)In so far as the company’s qualifying expenditure for that period is not so deductible, it may (on making a claim) treat 150% of that qualifying expenditure as if it were so deductible.
(4)This paragraph is without prejudice to any other deduction in respect of the qualifying expenditure.