Last week, it was all smiles and handshakes as Gordon Brown and President Barack Obama put on a show of unity in Washington.
But yesterday, Sir Gus O'Donnell, Britain's most senior civil servant, exposed transatlantic tension when he protested that Downing Street was finding it "unbelievably difficult" to plan for next month's G20 summit in London because of problems tracking down senior figures in the US administration. "There is nobody there. You cannot believe how difficult it is," the Cabinet Secretary told a civil service conference in Gateshead.
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