As the UK begins to circulate coins commemorating King Charles’ reign, Britons are scrutinising their currency more closely than ever. And many are only just discovering the ‘hidden’ image formed when a 1p, 5p, 10p, 20p, and 50p coin are arranged together.

The intrigue began in 2008 when The Royal Mint decided to refresh the coin designs after 40 years of the previous design. A statement from The Royal Mint reads: “The Royal Mint asked people to submit designs for the six coins that could…