David Miliband on fraternal rivalry and leadership war

Labour leadership rivals Ed and David Miliband deny they are at war as the contest enters a critical phase.

David said it was "nonsense" he was personally criticising brother Ed in a speech by warning against retreating into a left-wing "comfort zone".

Ed responded by warning about the party entering a "New Labour comfort zone" and ignoring its working class support.

Prior to making a keynote campaign speech, David Miliband spoke to Jon Sopel on BBC News Channel about what distinguishes his campaign from his brother's.