“ No marriage hereafter contracted (whether in or out of Great Britain) between a man and a woman who is the sister, aunt or niece of a former wife of his (whether living or not) , or was formerly the wife of his brother, uncle or nephew (whether living or not) , shall by reason of that relationship be void or voidable under any enactment or rule of law applying in Great Britain as a marriage between persons within the prohibited degrees of affinity. ”

“ An Act to enable a person to marry certain kin of a former spouse. [13th April, 1960]
BE it enacted by the Queen's most Excellent Majesty, by and with the advice and consent of the Lords Spiritual and Temporal, and Commons, in this present Parliament assembled, and by the authority of the same, as follows:—
Certain marriages to be void. ”