The Knight brothers reveal the secrets of Britain's biggest cash heist. In November 1983, almost £6m was stolen from the Security Express headquarters in Shoreditch, East London. Ronnie Knight, the former husband of the actress Barbara Windsor, was jailed after admitting handling some of the proceeds. He denied taking part in the actual robbery. John Knight was arrested in 1984 and sentenced to 22 years.—Ulf Kjell Gür