I have to say I was slightly underwhelmed by both candidates. Oona seemed to be a bit like Nick Clegg pre-election - promising 'change' for a changing London, and very much courting the youth vote. She also had a six-strong entourage with her, with a combined age of about 35. Oona was keen to focus on her recently published transport policy including an idea for school buses, which was rightly mocked by her opponent. 

Ken meanwhile got stuck in, wandering around the room and unstacking chairs before the start, appearing very much the 'old school' local activist. But I couldn't help but think that his best years are behind him; and Oona almost physically winced (as others probably did) as he launched into more stories of glories from old Labour days and past successes.

The Wimbledon crowd were polite, but unmoved. Too underwhelmed to applaud any answer - the odd chuckle slipped out after a Ken quip or two. Regards Boris, both candidates pointed - without much difficultly - to the fact that he hasn't really done anything as mayor, and his election campaign had been based on his wit and affability...and his strong dislike for bendy buses.

It was a sedate evening, summed up by one elder party member who declared that "we'd probably be perfectly happy with either of you as mayor."

Perhaps it was the gently probing audience, or the fatigue from travelling around London hustings, or the stuffy room with a lack of chairs (standing for two hours, I declined the invitation to the pub afterwards); but after last night's performance I envisage the votes will fall down to already embedded allegiances, with Oona securing the first-time voter / youth ticket.