Highlights from the Newsnight London Mayor debate

Least plausible comment: Ken Livingstone saying that his donations will all come from reputable sources and we can be sure of that because … the money will pass through the Labour Party. David Abrahams scandal anyone? Peter Hain’s problems anyone?

Least convincing reason given to believe: Ken promising that he will keep his word on the congestion charge and that him making the promise is a good enough reason to believe … a few minutes after admitting he hadn’t kept his promise on not standing for re-election for Mayor.

Best Michael Howard nostalgia moment: Boris Johnson repeatedly refusing to answer Jeremy Paxman’s question over how much his bendy buses policy would cost.

Least surprising revelation: Ken Livingstone prefers Brian Paddick to Boris Johnson.