Election TV debates only arrived in the UK in 2010 . Broadcasters are keen to repeat the head-to-head format in the run-up to the 2015 poll . The BBC has already announced that it will broadcast a debate between Mr Cameron and Ed Miliband on Thursday, with both candidates appearing at the same time for an audience of up to 10 million people
Election TV debates only arrived in the UK in 2010 . Broadcasters are keen to repeat the head-to-head format in the run-up to the 2015 poll . But factional politics and arguments about who is invited may derail a TV debate .