see more

30th May 1975: Len Lewis, assistant to the officer in charge of voting, checks the ballot boxes ahead of Britain's first ever referendum, when they will vote on whether the country should remain a member of the Common Market. (Photo by Wesley/Keystone/Getty Images)

30th May 1975:  Len Lewis, assistant to the officer in charge of voting, checks the ballot boxes ahead of Britain's first ever referendum, when they will vote on whether the country should remain a member of the Common Market.  (Photo by Wesley/Keystone/Getty Images)