But Khan seems to have serious sway in London, and Andy Burnham in Manchester,.
Bristol.gov states -
The Mayor has ultimate responsibility for all major policy decisions. Whilst some of this responsibility may be delegated to, or shared with Cabinet members, the Bristol Mayor currently retains this function. The Mayor makes 'executive' decisions within the budget and policy framework set by Full council.
He has been weak and frightened to lead on this issue IMO and its taken a mob to do his job for him.