A video grab image shows MPs voting on gay marriage legislation, in the House of Commons, London February 5, 2013. British lawmakers on Tuesday backed legalising gay marriage in the first of several votes on the issue after a debate which split Prime Minister David Cameron’s ruling Conservative party in two. REUTERS/UK Parliament (BRITAIN – Tags: POLITICS RELIGION SOCIETY) NO COMMERCIAL OR BOOK SALES. FOR EDITORIAL USE ONLY. NOT FOR SALE FOR MARKETING OR ADVERTISING CAMPAIGNS. NO THIRD PARTY SALES. NOT FOR USE BY REUTERS THIRD PARTY DISTRIBUTORS
