David Cameron speech: UK and the EU

David Cameron is to promise an in/out referendum on the EU if the Conservatives win the next election.

The Conservative leader wants to renegotiate the UK's relationship with the EU, before asking people to vote.

Once a new settlement has been achieved, the British people can vote either to accept it, or to leave the EU, Mr Cameron will say.

Labour's Ed Miliband said the speech showed the PM was "weak" and "driven by his party", not the national interest.

The referendum is thought likely to take place during the early part of the next parliament if the Conservatives win the election.

The speech had been scheduled for last Friday in the Netherlands, but was postponed because of the Algerian hostage crisis.

The Conservative leader has been under pressure from many of his MPs to give a binding commitment to a vote on Europe.

Setting out the conditions for a future referendum, Mr Cameron will say: "The next Conservative manifesto in 2015 will ask for a mandate from the British people for a Conservative government to negotiate a new settlement with our European partners in the next parliament.

The speech, taking place in central London, is expected to be watched closely by other European leaders, the business community and supporters and critics within his own party.