Tensions rise in the Conservative Party as the Prime Minister negotiates with the European Community member states in Maastricht. Mark Mardell follows the twists and turns of Britain's 45 year relationship with the European Union, but even though John Major succeeds in arranging Britain's opt outs of the 1992 treaty - on the single currency and the social chapter - is it enough to appease the rebels in his government? Email: worldatone@bbc.co.uk. Twitter: @BBCWorldatOne