LONDON - MAY 18: David Steel joint leader of the SDP Liberal Alliance at the launch of the Party Manifesto prior to the 1987 General Election campaign, May 18, 1987. (Photo by David Levenson/Getty Images)
LONDON - MAY 18: David Steel joint leader of the SDP Liberal Alliance at the launch of the Party Manifesto prior to the 1987 General Election campaign, May 18, 1987. (Photo by David Levenson/Getty Images)