Newly-elected Conservative Party Leader of the Opposition, Margaret Thatcher (1925 - 2013, second from right) lends her support to 'Keep Britain in Europe' campaigners in Parliament Square, London, on 4th June 1975, the day before voting in the United Kingdom EEC referendum (or Common Market referendum). Thatcher is wearing a sweater featuring the flags of European member states. Britain had joined the European Community two years earlier and the following day, just over two-thirds of voters backed continued British membership. (Photo by P. Floyd/Daily Express/Hulton Archive/Getty Images)
