Coe said  Johnson should focus his attention on the potential regeneration benefits to London on the Olympic project.

 

 

He said: "What I would advise is to understand this is the most complex piece of project management that any Mayor will ever have been involved in. This will be on a different planet.

 

 

"You are the Mayor of a city that has undertaken the most complex piece of work that the city has ever undertaken - the regeneration of 25 per cent of its land."

 

 

The mayoral election caused a shift of power on the Olympic board now Johnson joins it, with Olympics minister Tessa Jowell the sole Labour member.

 

 

Conservative sources said relations may be strained as Jowell spent the last weeks as the leader of Ken Livingstone's re-election campaign.