A SMILING pub landlord led a secret double life and was responsible for the deaths of nearly 600 people. Anyone supping a pint in a boozer where Albert Pierrepoint worked would more than likely be unaware that he was Britain’s most prolific hangman. 5 Albert Pierrepoint was Britain's longest serving executioner and went on to be a pub landlord Credit: Mirrorpix 5 Albert, seen here in 1952, on honeymoon with his wife Annie Credit: Getty 5 After retiring as an executioner Albert wrote his memoirs, seen here in around 1973 Credit: Getty Even as a youngster he had always wanted...