I'm horrified that the police officers decided to boot him in the head after tasering him. This could have caused serious brain damage, to a man who can clearly be described as vulnerable. For the Met to insist that this was acceptable and these officers were acting as they'd been trained is horrific.
This senseless brutality has been widely criticised, because one of the known (and intended) effects of using a taser on someone is neuromuscular incapacitation, an entirely involuntary tensing of their muscles. There is no way any suspect could have dropped whatever was in his hands immediately after that, and however hard they kicked him wouldn't have changed that. Anyone who issued with a taser should have known this.
The police's own training materials (https://www.college.police.uk/app/armed-policing/conducted-energy-devices-taser) suggest that a force should consider making a referral to the IOPC after a taser has been deployed against people with mental health problems, especially in "high profile" cases like this one, and as I understand the Met have now done this.
In the meantime, the Met's PR department have swung into action against any criticisism of these officers' actions. I find it chilling that this has extended to Mark Rowley, Keir Starmer and others slagging off Zack Polanski to such an extent that he seems to have been bullied into 'apologising' for simply retweeting a post which contained such well-founded concerns.
The Met are still institutionally racist, and the statistics show that tasers are deployed disproportionately against black people (who are 8 times more likely to have a taser used against them than white people), including children as young as 10, and the elderly.
Last summer, Met officers threatened to use a taser against a 90 year old black woman with dementia, after they'd already handcuffed her and put her in a spit-hood.
Incredibly, there have even been instances of police using tasers against blind people - and then admitting that the officers involved had mistaken their white sticks for weapons.