5A.—(1) Where—
(a)a widow or widower (call that person “W”) is entitled to a Category A or Category B retirement pension and was married to the other party to the marriage (call that person “S”) when S dies, and
(b)S either—
(i)was entitled to a guaranteed minimum pension with an increase under section 11(1) of the Pensions Act, or
(ii)would have been so entitled if S had retired on the date of S’s death,
the rate of W’s pension shall be increased by the following amount.
(2) The amount is—
(a)where W is a widow, an amount equal to the sum of the amounts set out in paragraph 5A(2) or (3) below (as the case may be), and
(b)where W is a widower, an amount equal to the sum of the amounts set out in paragraph 6(2), (3) or (4) below (as the case may be).