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
Guernsey pound than the modern version and the diameter also measured slightly less. The 1-pound coin ceased to be legal tender on 15 October 2017 to coincide with the withdrawal of the circular £1 coin in the UK. The UK's new twelve-sided £1 coin will be the only £1 coin that is legal tender on the island. The first decimal issues continued with the same obverse as the last pre-decimal issues until 1985, when Raphael Maklouf's portrait of Queen Elizabeth II was added. Ian Rank-Broadley's portrait of the Queen has appeared since 1998. Designs on the reverses of Guernsey's decimal coins are: