In an exclusive interview with Telegraph TV, ahead of a speech at Chatham House on Wednesday, Morris Reid, a former adviser to President Bill Clinton, said: “The special relationship (with the UK) is over and dead. It’s a different day.”

Reid’s speech entitled “Europe must show leadership and stop waiting on the United States” will make the point that “it is not smart for European politicians to think the American President needs to care about their concerns. And it is also not smart for Gordon Brown to expect Barack Obama to do the things he needs to do at home.”

He will add: “This is not about special relationships. It’s about rolling up our sleeves and working together – all of us.”