8. Subject to regulation 9, the amount of a welfare supplementary payment to which a person is entitled under this Part is—
(a)in the cases mentioned in regulation 7(2)(a) and (c), an amount corresponding to the difference between the amount of the previous award of contributory employment and support allowance and the amount of the new award of income-related employment and support allowance;
(b)in the cases mentioned in regulation 7(2)(b) and (d), an amount corresponding to the amount of the previous award of contributory employment and support allowance.