PMQs: Cameron and Jones on Tory MPs defecting to UKIP

The prime minister was asked about further defections to UKIP, by Labour MP Graham Jones.

The first question at PMQs was followed by further references to Thursday's Rochester and Strood by-election, the second to be caused by Tory MP Mark Reckless standing down to contest the seat as a UKIP candidate.

BBC coverage of PMQs in text and video