Until Tony Blair intervened in the debate with his reminder of the significance of a referendum on the UK’s membership of the European Union, during his Sedgefield speech on 7 April, I had feared the future historians might dub this “the sleepwalkers’ general election”. Why? Because the political conversation and the press coverage up to that point had all been about us – not us and the rest of the world.I know that the organised rowing of an election campaign is, of its very nature, a “domestic” (as old-fashioned policemen liked to call it). But to ignore the interlocking questions of foreign and defence policies and Britain’s place in the world – a striking feature of the seven-party leaders’ debate on 2 April – was takin