Section 356EB | Carrying forward of unactivated allowance
From legislation.gov.uk
(1)This section applies where X is greater than Y in the case of an accounting period of a company and a site, where—
X is the closing balance of unactivated allowance for the accounting period and the site;
Y is the company's relevant income for the accounting period from that site.
(2)An amount equal to the difference between X and Y is treated as onshore allowance held by the company for that site for the next accounting period (and is treated as held with effect from the beginning of that period).