The Banking and Financial Dealings Act 1971 received royal assent on 16 December 1971 and wrote the last Monday in May into Schedule 1 for England and Wales and for Northern Ireland, in place of the moveable Monday in Whitsun week appointed by the Bank Holidays Act 1871. Royal proclamations under the older Act had already trialled the change in England and Wales in 1967 and again in 1970.
A White Paper about congestion, not the church
The push came from traffic. A White Paper on Staggered Holidays, Command Paper No. 2105, was laid before Parliament in July 1963. The Government's stated aim was the extension of the holiday season and the avoidance of congestion at peak holiday times.
Edward Heath, then President of the Board of Trade, put the plan to the Commons on 4 March 1964. He wanted a fixed spring Bank Holiday on the last Monday in May in place of Whit Monday. Hansard's index carries no earlier parliamentary use of the words spring bank holiday, against 128 contributions for Whit Monday across the record from 1803 up to that day.


