US presidential candidate Mitt Romney has been visiting politicians during his campaigning and fundraising visit to London, at one point appearing to forget Ed Miliband's name.

Meeting Mr Miliband in his Westminster office, Mr Romney said he recognised the "unique relationship" which exists between Britain and the United States.

Addressing the Labour leader, Mr Romney said: "Like you, Mr Leader, I look forward to our conversations this morning... and recognise, of course, the unique relationship that exists between our nations."

It has led to speculation he might have momentarily forgotten Miliband's name.

Mr Romney's visit - during which he was also meeting Deputy Prime Minister Nick Clegg, Chancellor George Osborne and former PM Tony Blair - is an important opportunity for the Republican to demonstrate his grasp of foreign affairs and ability to represent the US overseas.