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The Bank of England has unveiled the new £50 note featuring mathematician and computer science pioneer Alan Turing, who helped the Allies win World War II with his code-breaking prowess but died an outcast after facing government persecution over his homosexuality.

The bank revealed the note's design and features — which include a number of clever visual references to Turing's work — on Thursday, nearly two years after first announcing that it would honor Turing. The banknote will officially enter circulation on June 23, Turing's birthday.