50 Pence - Elizabeth II 5th portrait, Alan Turing

Released to mark the centenary of Turing's prosecution — he was chemically castrated by the British government in 1952 after conviction for gross indecency, and died two years later in circumstances still debated as suicide or accidental poisoning — this coin sits at an uncomfortable intersection of official commemoration and institutional guilt. The Royal Mint had already issued a Turing 50p in 2021 for the broader centenary of his birth, making this a follow-on release rather than the sole tribute.

Turing's wartime codebreaking at Bletchley Park, particularly his work on breaking the Naval Enigma, is credited with shortening the war by an estimated two years — a figure historians dispute but cite persistently.