The Royal Mint has revealed its top ten rarest 50 pence coins currently in circulation in the UK. The Atlantic Salmon 50p coin, minted in 2023, has a mintage of just 200,000, making it rarer than the Kew Gardens 50p coin, which has a mintage of 210,000. The Kew Gardens 50p coin averages £156.25 at auction, with some pieces selling for over £700. A total of 1.1 million of each coin listed was produced.