Cameron: 'I won't be PM if we don't have EU referendum'

Conservative leader David Cameron has said he would not be prime minister of a government that failed to deliver an in/out referendum on EU membership.

Mr Cameron was talking to the BBC's Nick Robinson about the likelihood of the Lib Dems blocking a referendum, in the event of another coalition government.

Earlier, the BBC's Andrew Marr pressed Lib Dem leader Nick Clegg on whether he would refuse to deal with the Tories if they stuck to their referendum pledge.