General election 2015: Farage invited on TV debate

UK Independence Party leader Nigel Farage has been invited to take part in a TV debate with David Cameron, Ed Miliband and Nick Clegg ahead of next year's general election.

The BBC, ITV, Sky and Channel 4 have announced plans to hold three debates.

One would involve a head-to-head debate between just the Conservative and Labour leaders, and another would include the Liberal Democrat leader.

The other debate would involve all three leaders plus Mr Farage, as Norman Smith explains.