No not "acid" ...
50 Years ago today the UK gave up tanners, florins, half-crowns etc and went decimal.
www.bbc.co.uk
www.theguardian.com
50 Years ago today the UK gave up tanners, florins, half-crowns etc and went decimal.

Decimalisation and the coin you really want to find in your change
To mark 50 years since decimalisation in the UK, an expert from The Royal Mint highlights recent coins of interest.


‘D Day’: UK marks 50 years since decimalisation
On 15 February 1971, Britain finally moved to a system that made sense to ‘every man who looked at his 10 fingers’