Decimal Day weights and measures.) Around the time of Decimalisation Day, "Decimal Adders" and other converters were available to help people convert between the old and new coins. The following is a table showing conversions between the decimal and pre-decimal systems. All pre-decimal coins (except for certain non-circulating coins such as crowns, sovereigns, and double florins which were explicitly excluded from demonetisation) are now no longer legal tender. Public outcry at the proposed demise of the old sixpence (6d), worth exactly p and originally slated for early withdrawal, postponed its withdrawal until June 1980. Shillings and florins, together with their same-sized 5p
Penny (British pre-decimal coin) 1797, and contained a smaller amount of copper. In 1857 a survey by the Royal Mint found that around one third of all copper coinage was worn or mutilated, often by advertisements. Two years later Thomas Graham, the Master of the Mint, convinced William Ewart Gladstone, then Chancellor of the Exchequer, that so large a part of the copper coinage must be taken out of circulation that it was worth introducing a whole new coinage which would be "much more convenient and agreeable in use". These new coins were minted in bronze, and their specifications were no longer constrained by