Britain’s Prime Minister David Cameron and Home Secretary Theresa May (L) walk through Terminal 5 during a visit to UK Border Agency staff, at Heathrow Airport, London November 23, 2010. Britain said on Tuesday it would cap the number of skilled migrant workers it allows from outside the European Union at 21,700 a year, a cut of more than a fifth from 2009 levels. REUTERS/Steve Parsons/Pool (BRITAIN – Tags: POLITICS SOCIETY)