Metrication in the United Kingdom that reported in 1818, and again in Parliament by Sir John Wrottesley in 1824. Another Royal Commission was set up 1838 by Chancellor of the Exchequer Thomas Spring Rice and it reported in 1841 that decimal coinage was required first. A third commission in 1853 advocated decimal coinage in the form £1 : 10 florins : 100 cents: 1000 mils. The first florins (one tenth of a pound sterling) were struck in 1849 as silver coins weighing and having a diameter of . An early supporter of the "Decimal Association" was the mathematician Augustus de Morgan whose articles supporting the
Decimal Day Decimal Day On 15 February 1971, known as Decimal Day, the United Kingdom and Ireland decimalised their currencies. Under the old currency of pounds, shillings and pence, the pound was made up of 240 pence (denoted by the letter "d" for Latin "denarius" and now referred to as "old pence"), with 12 pence in a shilling and 20 shillings (denoted by "s" for Latin "solidus") in a pound. The loss of value of the currency meant that the "old" penny, with the same diameter as the US half-dollar, had become of relatively low value. The Coinage Act of 1792 had