This second programme goes behind the closed doors of Whitehall and Brussels to hear from the decision-makers about the twists and turns in Britain's relationship with the EEC, now EU.It examines the way the first European referendum was fought 40 years ago, and the changes in the European project since then. After the British people gave their consent in 1975 to Harold Wilson's referendum, successive governments have battled to maintain that consent, from Margaret Thatcher's rebate battle to John Major's Black Wednesday and Maastrict rebels to Tony Blair's position on joining the European single currency, the rise of UKIP, and to the current debate following David Cameron's proposal of an in-out referendum this June.