and here boys and girls is the section in question:
18A.
Effect of dissolution or annulment of marriage on wills.
— (1) Where, after a testator has made a will, a decree of a court [F14 of civil jurisdiction in England and Wales] dissolves or annuls his marriage [F15 or his marriage is dissolved or annulled and the divorce or annulment is entitled to recognition in England and Wales by virtue of Part II of the M1 Family Law Act 1986] ,—
[F16 (a)
provisions of the will appointing executors or trustees or conferring a power of appointment, if they appoint or confer the power on the former spouse, shall take effect as if the former spouse had died on the date on which the marriage is dissolved or annulled, and
(b)
any property which, or an interest in which, is devised or bequeathed to the former spouse shall pass as if the former spouse had died on that date,]
(2) Subsection (1)(b) above is without prejudice to any right of the former spouse to apply for financial provision under the M2 Inheritance (Provision for Family and Dependants) Act 1975.
In my humble opinion, the common sense rule would be that Gladys gets it as she has been certainly defined in the will - GS, and there is certainty of material 50 thou knicker, and that is perhaps why they had the reform.