Finance Act 1980

4 (1) Where the profits or gains on which a person has been assessed to income tax for any year of assessment are adjusted under section 115, 117 or 118 of the Taxes Act, then, if the adjustment relates to a year of assessment—

(a) for which he has become liable to be assessed in respect of a charge deferred pursuant to an election under this Part of this Schedule ; or

(b) for which he would have been liable to be assessed in respect of the charge if it had not been so deferred,

he (or if he has died, his personal representatives) may revoke the election by notice in writing sent to the inspector within one year after the end of the year of assessment in which the adjustment is made.

(2) Where an election is revoked under this paragraph the said Schedule 5 shall have effect as if the election had not been made and all such assessments or alterations of assessments or repayments of tax may be made as are required to restore the position to what it would have been but for the election.