The bicycles have been brought out and eager fists are getting ready to knock on hundreds of doors as the race for one of the most sought-after jobs in British politics springs into action.
Sadiq Khan has had a vice-like grip on London, but a range of candidates hoping to unseat him in 2028 have announced themselves. The three-time mayor has been coy about whether he will stand again, and said he would make a decision next year.