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13th October 1971: Prime Minister Edward Heath and Foreign Secretary Sir Alec Douglas-Home riveted by the fierce debate over the Common Market taking place at the Conservative Party Conference in Brighton. (Photo by Central Press/Getty Images)

13th October 1971:  Prime Minister Edward Heath and Foreign Secretary Sir Alec Douglas-Home riveted by the fierce debate over the Common Market taking place at the Conservative Party Conference in Brighton.  (Photo by Central Press/Getty Images)