As the Republican presidential challenger accused Barack Obama of appeasing America's enemies in his first foreign policy speech of the US general election campaign, advisers told The Daily Telegraph that he would abandon Mr Obama’s “Left-wing” coolness towards London.

In remarks that may prompt accusations of racial insensitivity, one suggested that Mr Romney was better placed to understand the depth of ties between the two countries than Mr Obama, whose father was from Africa.

“We are part of an Anglo-Saxon heritage, and he feels that the special relationship is special,” the adviser said of Mr Romney, adding: “The White House didn’t fully appreciate the shared history we have”.