Boris Johnson has volunteered to be blasted by a water cannon. The Mayor of London was challenged over their safety, and replied: "Man or mouse. You’ve challenged me, so I suppose I’m going to have to do it now."
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They said they wouldn't do it. But the Met Police couldn't resist the challenge set by their colleagues in Scotland.
The results of the first preference votes counted so far gives an early indication that Mr Khan is line to take power at City Hall.
Mr Goldsmith's campaign, run by Sir Lynton's communications firm has come under fire from Labour.