Labour MPs and potential rival mayoral candidates David Lammy and Tessa Jowell are among those fighting for co-operative approaches to London's problems.
Labour backbencher and Tottenham MP David Lammy is the first politician to declare his wish to be Labour's London mayoral candidate.
With Johnson departing, City Hall is the opposition's for the taking. But which contender will move first?
When it comes to tackling the real issues facing the city, Boris has failed spectacularly.
David Lammy, Sadiq Khan, Diane Abbott and the other runners and riders.
A shocking night of anger, violence and looting on the streets of north London.