Five million new 50p coins enter circulation giving people chance to own a 'piece of history'.The Royal Mint has issued the coin, which features an image of Westminster Abbey on one side, and the King's profile on the other. It comes as a special 50p coin commemorating the coronation of King Charles has been launched today, August 10, with five million editions entering circulation. People in the UK are being urged to check their pockets and purses for some rare 50p coins that could be worth a lot of money.