United States President Barack Obama has promised troops in Afghanistan that the war will come to a close by the end of 2014.
The Associated Press reported Mr Obama had said Afghan forces would be taking primary responsibility for the security of their country.
The President made the statement at an unannounced visit to Bagram Air Field ahead of the United States' Memorial Day holiday.
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British soldiers will join troops from some 30 countries who work in the country.
The demand comes after the Prime Minister urged a "grown up" relationship between her government and the devolved administrations.
The rapper failed to make it to London in time as he had problems with his passport.