MPs back Cameron's EU referendum plans but debate highlights risks

By Kylie MacLellan and William James LONDON (Reuters) - Members of Parliament on Tuesday backed Prime Minister David Cameron's plan for a referendum on Britain's EU membership, but a heated debate highlighted passions that could split his Conservative Party and re-open Scotland's bid for independence. Cameron, seeking to put an end to a decades-old rift within his party over Britain's place in Europe, has promised to negotiate a new settlement with Brussels and hold a referen