The boxes are now all counted. All 14 GLA constituencies declared, Mayoral result shortly (for some value of shortly).
Just how difficult could a Lab-Grn majority in the GLA hypothetically make Boris' life? I understand it takes a 2/3rds majority (!) to block a mayor's budget?
It takes a two-thirds majority for them to amend the mayor's budget or any of his statutory provisions. Otherwise, they only have the power to investigate, question, and advise. To get 2/3 Labour and Green would need both Lib Dems and a Conservative defector somehow.
The only thing I can think of that could maybe get the required supermajority would be if Labour decided to push for some sort of local initiative/referendum process- they'd presumably get Lib Dem support and could probably get Andrew Boff to buck his party on the issue.