So Sadiq Kan has no authority or influence over Met Police policy?
I think you know your argument isnt really very valid, the Mayors office does not have significant control of the Mets budget, certainly not enough to reverse the governments cuts since 2010.
Since 2010-11 the Met’s general grant funding from the Government has fallen by more than £700 million or nearly 40 per cent in real terms on a like for like basis and in recent years the Met police have had to find more than £600m of cuts.
This has led to the loss of a third of police staff posts – down from 14,330 to 9,985, two-thirds of police community support officer posts – down from 4,607 to 1,591, as well as 114 police station front counters and 120 police buildings
https://www.london.gov.uk/press-releases/mayoral/stark-reality-of-government-police-funding-cuts