A law recognizing civil partnerships in England and Wales was passed in 2004 . House of Commons approves same-sex marriage . PM David Cameron backs the bill , but many in his party oppose it . Cameron is also under pressure from party members over Britain 's role in Europe . The UK has a referendum on EU membership next year and some Conservative MPs are calling for an exit vote to be held before that time.
House of Commons approves same-sex marriage . PM David Cameron backs the bill , but many in his party oppose it . Cameron is also under pressure from party members over Britain 's role in Europe . The UK has a referendum on EU membership next year and some Conservative MPs are calling for an exit vote to be held before that time.