Media playback is unsupported on your device

Ken Livingstone criticised by Labour peer Robert Winston

24 April 2012 Last updated at 13:57 BST

Lord Winston said the party's candidate for mayor of London was "quite a tricky sort of customer" who has "espoused some disastrous causes".

The Labour peer said the party should have had a "fresher view" for the capital than Ken Livingstone.

Seven candidates are on the 3 May ballot papers.

Vote 2012 index

MORE FROM THE DAILY POLITICS

More clips and news on our BBC website; 'like' us on Facebook page; follow us on Twitter