The term ‘piedfort’ basically means the coin is double the thickness of a standard issue (Thus double the weight).

The first UK silver proof piedfort coin was issued in 1982 – The 1982 silver proof piedfort twenty pence piece.

UK Silver proof piedfort coins are issued along side standard silver proof coins. Many coin ranges, such as the one pound, two pounds, fifty pence and five pounds are produced yearly by the Royal Mint.