On the eve of the Summit of Common Market Leaders, Fred Emery reports on the battle for the future of Europe after 1992. Mrs Thatcher has challenged Britain's European partners not to rush ahead with schemes for a united Europe, introducing socialism by the back door. The Rt Hon Norman Tebbit , MP and the Rt Hon Michael Heseltine , MP, EEC Commissioner Lord Cockfield, Eurochief Jacques Delors and former French president Valery Giscard D'Estaing join the argument.