Good summary from Michael.
And Khan has not been an "absolute failure as a Mayor", although Tory politicians ceaselessly attack him on those grounds using baseless and meaningless word-salad accusations borne of the huge void that represents their policies for London.
There is no attack on motorists in London - there is no charge-per-mile proposals in hand. 95% of vehicles in London are ULEZ compliant and are unaffected by ULEZ in any form.
Universal success across the board in all policy matters eludes the best of our politicians but any significant failure in any one candidate's portfolio (should there be one) does not make for a platform to propose the eradication of the role.