John Smith was a British Labour Party politician who served as Leader of the Opposition and Leader of the Labour Party from July 1992 until his death from a heart attack in May 1994. He was also the Member of Parliament (MP) for Monklands East.

The Leader of His Majesty's Most Loyal Opposition, more commonly referred to as the Leader of the Opposition, is the person who leads the Official Opposition in the United Kingdom. The position is seen as the shadow head of government of the United Kingdom and thus the shadow prime minister of the United Kingdom.