Ken spies on Boris and warns him: I'll be back every month

The former Mayor said he had been in politics for so long he didn't know what else to do and said that he would attend every one of the Mayor's monthly Question Time sessions for the next four years.

Mr Livingstone arrived at his old stomping ground shortly before 10am to watch the newly formed London Assembly at their annual meeting.

Dressed in his trademark beige linen suit he sat in the front row of the public chamber looking pensive but less tired than during the campaign.

He said: "I've come to watch the fun. I've been in politics for 40 years so I'm not about to quit now.

"I started out going to watch the Lambeth council meetings and I'm going to make sure I turn up to all of Boris's question times. He has nothing to worry about though. I'm just coming along to observe not to make trouble."

Mr Livingstone seemed upbeat about his defeat and said he had been concentrating on getting some sleep and weeding his garden.

He also said he was planning to spend the majority of the next year writing a book about his time in office.

When asked about Mr Johnson's recent ousting of the chair and the chief executive of the London Development Agency - which is at the centre of the Lee Jasper allegation of corruption - he said it was a foolish move.

Mr Livingstone said: "I think he's made a mistake, all he seems to be doing is putting in a group of his friends rather than people who can do the job. It's a real mistake.

"I'm not worried about what they might uncover. But right now I'm going to concentrate on making sure Labour get back into power."

During today's meeting, the Lib-Dems, Labour party and the Green party formed an alliance to give them a majority and enabling them to force through moves despite the Tories having the most seats with 11 seats.

The group, referred to as a "rainbow of colours" by the Tories, forced through the appointment of Labour member Jennette Arnold as chair of the Assembly and Darren Johnson of the Greens as her deputy.

However, Richard Barnes, leader of the Conservative group, said: "London has voted, the results have been counted and the results have been announced. London has spoken, we have a much enlarged majority and the chair should be a Conservative."

Following the meeting the Assembly members were joined by both Mr Johnson and Mr Livingstone.