One of the party's most charismatic figures, Michael Heseltine was once seen as a natural heir to the Tory crown. But he lost out to John Major after precipitating Mrs Thatcher's downfall.
He entered parliament in 1966 and began climbing the ladder under Ted Heath. In 1986 he resigned from the Cabinet in a row over the Westland helicopter company.
He stepped down as an MP in 2001 having served as deputy prime minister under Mr Major and is now Lord Heseltine.