3.—(1) The amount of a welfare supplementary payment to which a person is entitled is the difference between—
(a)the housing benefit to which the person would be entitled but for the reduction under regulation B14(2)(b) of the Housing Benefit Regulations, and
(b)the housing benefit (if any) to which the person is entitled after that reduction.
(2) Accordingly, where there is a variation in the amount by which the housing benefit is reduced as mentioned in paragraph (1), the amount of the welfare supplementary payment to which the person is entitled is varied by the same amount.