Coins of the pound sterling coins' designs. As of 31 March 2016, there were an estimated 30.14 billion coins circulating in the United Kingdom. The first decimal coins were circulated in 1968. These were the five pence (5p) and ten pence (10p), and had values of one shilling (1/-) and two shillings (2/-), respectively, under the pre-decimal £sd system. The decimal coins are minted in copper-plated steel (previously bronze), nickel-plated steel, cupronickel and nickel-brass. The two-pound coins, and, as from 28 March 2017 the new one-pound coins, are bimetallic. The coins are discs, except for the twenty pence and fifty pence pieces, both of which
Irish pound in the United Kingdom. From 1938, the means of tender was referred to as the "Irish Pound", after the Constitution of Ireland changed the state's name. The Currency Act, 1927, Adaptation Order, 1938 was the actual mechanism by which change took place. The "Report of the Metric System and Decimal Coinage Committee" (1959) was amongst the first formal reports on decimalisation of the currency, discussion continued into the 1960s on the topic. When the British government decided to decimalise its currency, the Irish government followed suit. The legislative basis for decimalisation in the Republic was the Decimal Currency Act, 1969.