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British Conservative Party leader Edward Heath (1919 - 2005) at a polling station at Pulteney College in Westminster, London, on general election day, 10th October 1974. (Photo by P. Shirley/Daily Express/Hulton Archive/Getty Images)

British Conservative Party leader Edward Heath (1919 - 2005) at a polling station at Pulteney College in Westminster, London, on general election day, 10th October 1974. (Photo by P. Shirley/Daily Express/Hulton Archive/Getty Images)