(1)A person has unrelieved qualifying expenditure to carry forward from a chargeable period if for that period AQE exceeds TDR.
(2)The amount of the unrelieved qualifying expenditure is—
(a)the excess less the writing-down allowance made for the period, or
(b)if no writing-down allowance is claimed for the period, the excess.
(3)No amount may be carried forward as unrelieved qualifying expenditure from the final chargeable period.