France may have kept secret the existence of a “kill switch” which negated the threat of its much-vaunted Exocet missile, which Argentina used to destroy a British warship during the Falklands War 40 years ago.
Pierre Razoux, a former French defence official, has told the Daily Telegraph the French knew of a way of stopping the incoming missiles but did not hand it over before the sinking of HMS Sheffield in May 1982.