The British Fifty Pence (50p) is a 7-sided coin that was introduced in October 1969 as part of the decimalisation of the British currency. It replaced the 10 shilling note, both being equivalent to half of one pound (£0.50). It was resized in 1997. There's about one billion 50p pieces in current circulation.

		1998 50 Pence Coin - EEC Mintage: 5,043,000
		1998 50 Pence Coin - NHS Mintage: 5,001,000
		2000 50 Pence Coin - Public Libraries Mintage: 11,263,000
		2001 50 Pence Coin Mintage: 84,998,500
		2003 50 Pence Coin - Suffragette Mintage: 3,124,030
		2004 50 Pence Coin - Four-minute mile Mintage: 9,032,500
		2005 50 Pence Coin - Johnsons Dictionary Mintage: 17,649,000
		2006 50 Pence Coin - VC Medal Mintage: 12,087,000
		2006 50 Pence Coin - VC Soldier Mintage: 10,000,500
		2007 50 Pence Coin - Scouts Mintage: 7,710,750
		2009 50 Pence Coin - Kew Gardens Mintage: 210,000
		2010 50 Pence Coin - Girl Guides Mintage: 7,410,090
		2011 50 Pence Coin - WWF Mintage: 3,400,000
		2012 50 Pence Coin - Shield Mintage: 32,300,030
		2013 50 Pence Coin - Benjamin Britten Mintage: 5,300,000
		2013 50 Pence Coin - Christopher Ironside Mintage: 7,000,000
		2014 50 Pence Coin - Glasgow Games Mintage: 6,500,000
		2016 50 Pence Coin - Beatrix Potter Anniversary Mintage: 6,900,000
		2016 Silver Proof 50 Pence - Squirrel Nutkin Mintage: 15,000
		2017 Silver Proof 50 Pence - Peter Rabbit Colour Mintage: 30,000