I remember the 2019 prorogation demonstrations in London. The police used ambulances (driven by cops) as battering rams to clear the streets, driving them at crowds. It's a ploy to get grounds for arrest: if you stand your ground then you're "blocking emergency services."
There is nothing good about the Met, and that's not a problem that can be solved by changing the person at the top or even a NI-style name change. The problem is systemic.