John Smith QC ( 13 September 1938 -- 12 May 1994 ) was a British Labour Party politician who served as Leader of the Labour Party from July 1992 until his death from a heart attack in May 1994 .
John Smith ( 13 September 1938 - 12 May 1994 ) was a British politician who was the leader of the Labour Party from July 1992 until his death from a heart attack .