M1Where in any year of assessment the relief to which a person is entitled under section 266, otherwise than in accordance with subsections (6) and (7) of that section, has not been fully given in accordance with that section and the preceding provisions of this Schedule, he may claim relief for the difference, and relief for the difference shall then be given by a payment made by the Board or by discharge or repayment of tax or partly in one such manner and partly in another; and where relief so given to any person exceeds that to which he is entitled under section 266, he shall be liable to make good the excess and an inspector may make such assessments as may in his judgment be required for recovering the excess.

The Management Act shall apply to any assessment under this paragraph as if it were an assessment to tax for the year of assessment in which the relief was given F1. . . .