@urlyman Not the biggest mass arrest at a UK political protest, though.
1300 arrested for civil disobedience at Trafalgar Square & 350 at Holy Loch submarine base in Sept 1961.
752 over 4 days at Upper Heyford USAF base 31 May to 1 June 1983.
475 at Parliament Square on 14 November 1983 over announcement that Cruise missiles had arrived in the UK.
“Hundreds” of women arrested for pulling down fences at Greenham Common on 11 December 1983.
All of the above were protesting nuclear weapons.
@steviferous agreed.

The wording in the article is more precise than my paraphrasing of it:

“made by the Metropolitan Police at a single protest event”.

And the number of “466” that it cited proved to be higher than that, and higher than 475.

The thing about numbers generally is they lend themselves to comparison and we end up focusing on that instead of the dysfunction they highlight

…Before the protest, a spokesperson for the Metropolitan police said: “We are aware that the organisers of Saturday’s planned protest are encouraging hundreds of people to turn out with the intention of placing a strain on the police and the wider criminal justice system.”

theguardian.com/world/2025/aug

Which is exactly what is needed when idiot MPs pass bad law sculpted by a reactionary Home Secretary propping up indefensible foreign policy from a Labour government full of shit

@urlyman

The police are allowed to prioritise the crimes that they choose to devote effort to solving. Every crime that was not investigated by the Met Police over the weekend because they decided to arrest non-violent protesters was a policy decision by their leadership. Newspapers need to start listing every crime that was not investigated because the police decided to prioritise pointless activity.

@david_chisnall I was open to the idea I saw expressed earlier that they might be intentionally placing pressure on a bad law so that it might be reconsidered. Unlikely, but theoretically possible.

But then I just chatted to my son who happened to be in Trafalgar Square yesterday catching up with a friend. They didn’t know what was going on just half a mile away and were wondering why there were Lancashire Police cars parked up on Northumberland Avenue…

@COMPU73E @urlyman @david_chisnall

Folk also saw officers with "Heddlu" caps so they had also come from Wales (which is surely having a knock on effect in all these other regions if any real crime happens there).

Last week in Suffolk there were 4 different road traffic collisions on one afternoon and I saw one RPU officer single crewed having to deal with a closure to a main highway route (and a secondary incident that had occured about 100m away) on his own, so its not as if they are flush with resources..

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…When a government takes 19 months to participate in dropping food aid that actually kills people when it lands on them, instead of doing anything substantive to undermine a psychopathic government that it still sends military supplies to, I think we know who the terrorists are.

And it ain’t people holding signs or throwing paint at killing machines in a rampant industrial overshoot crisis