The Mint does not, by itself, decide when and which coins will be struck - Treasury orders coins be made, and the Mint supplies them to order. So the simple answer to the question is, "Treasury didn't order any coins that year".
This, of course, does not fundamentally answer the question. Treasury did not order coins that year (or in subsequent years) for the reasons outlined above by others: there was plenty of coin, both old and new, in circulation and the economy was not growing fast enough to need more at that time.
Quote:Oh, and didn't
The Royal Mint move around that time, or was that in the late 1960s?
Yes, to both parts of your question. From Wikipedia:
Quote:
In 1967 it was announced that the Mint would move away from London to new buildings in Llantrisant, ten miles (16 km) north west of Cardiff. The first phase was opened by Queen Elizabeth II on 17 December 1968, and production gradually shifted to the new site over the next seven years until the last coin, a gold sovereign, was struck in London in November 1975.
Which does go at least partway towards explaining why there was an oversupply of coinage in circulation from years prior to 1972: Britain had not one but two Royal Mints, each capable of operating at more than half the capacity of the old mint.
Don't say "infinitely" when you mean "very"; otherwise, you'll have no word left when you want to talk about something really infinite. - C. S. Lewis