New pressure for TV leaders' debate

Gordon Brown is facing renewed calls to take part in a TV debate between party leaders in the run-up to the next general election.

The prime minister has previously rebuffed calls for the three to face each other, saying there is a weekly debate at prime minister's questions.

But Sky News says it will host a live debate and will "empty chair" any leader who does not take part.

Tory leader David Cameron and Lib Dem Nick Clegg say they will take part but Mr Brown has made no such commitment.

The political commentators Andrew Neil and Andrew Rawnsley - who have both been mooted as potential hosts - discussed the pros and cons of a leaders' debate with Eddie Mair on Radio 4's PM.