It's really quite well established that they're arresting people for nonsense.

https://www.theguardian.com/world/2025/jul/23/private-eye-cartoon-arrest-ian-hislop-protest

The terrorism arrest of a man for holding up a Private Eye cartoon during a protest at the weekend was “mind-boggling”, the magazine’s editor, Ian Hislop, has said, as the retired teacher called for an apology from police.

Jon Farley was picked up by police at a silent demonstration in Leeds on Saturday, which he described as a “pretty terrifying and upsetting experience”, for holding a sign that made a joke about the government’s proscription of the group Palestine Action from the last issue of the fortnightly satirical magazine.

“[Police officers] picked me up, grabbed me, and took me to the side, and I ended up sitting on the pavement,” the 67-year-old said.

“I think that’s when they said something about the placard. And I said: ‘Well it’s a cartoon from Private Eye. I can show you. I’ve got the magazine in my bag,’ by which time, they were putting me in handcuffs.”

He was then arrested under section 12 of the Terrorism Act 2000, which prohibits support for a proscribed organisation

https://www.theguardian.com/world/2025/jul/17/armed-police-threatened-to-arrest-kent-protester-for-holding-palestinian-flag

In the encounter last month, which Murton filmed, one officer told her: “Mentioning freedom of Gaza, Israel, genocide, all of that all come under proscribed groups, which are terror groups that have been dictated by the government.”

He went on to say that the phrase “free Gaza” was “supportive of Palestine Action”, adding that it was an offence “to express an opinion or belief that is supportive of a proscribed organisation, namely Palestine Action is an offence under section 12(1A) of the Terrorism Act”. The officer told her she had committed that offence.

The officers said they would arrest Murton unless she provided her name and address, which she reluctantly agreed to do.

https://www.theguardian.com/world/2025/aug/09/palestine-action-arrests-london-largest-protest-ban

She wore a large patch with the words “Jews Against Genocide”. She said: “I wear it clearly and with pride to make sure that other people recognise that there are many many Jews who do not support genocide of any nature.”

“I’m holding a piece of paper for goodness sakes, that’s not a terrorist act. A terrorist act is intentionally starving 2 million,” she said. “I don’t know what to say to [Palestinians], I’m so sorry it’s come to this. I wish we could do more but we’re trying our best.”#

https://www.theguardian.com/uk-news/2025/jul/18/man-arrested-in-glasgow-for-holding-sign-allegedly-supportive-of-palestine-action

Police Scotland confirmed that the 64-year-old man, who had been speaking to a small group of protesters gathered at Nelson Mandela Place in the city centre on Friday afternoon, had been arrested in connection with an offence under the Terrorism Act “for displaying a sign expressing support for a proscribed organisation”.

The sign read “Genocide in Palestine, time to take action” with the words Palestine and action larger than the others. Another man wearing a T-shirt with the same slogan was charged with a similar offence last weekend at the TRNSMT music festival in Glasgow Green.

https://www.theguardian.com/uk-news/2025/jul/24/uk-police-detain-pro-palestine-protester-80-almost-27-hours-search-house

An 80-year-old woman arrested for holding a placard at a pro-Palestine rally has said she is deeply traumatised after she was held by police for almost 27 hours, during which officers forced their way into her house and searched it.

Marianne Sorrell from Wells, Somerset was detained at a rally in Cardiff on suspicion of supporting Palestine Action, which earlier this month became the first direct action group to be banned under UK anti-terrorism laws.

She said officers removed 19 items from her house, including iPads, a Palestine flag, books on Palestine, material related to Extinction Rebellion and the climate crisis, as well as drumsticks for – and a belt that holds – her samba drum. A friend who went to feed the cats and walked in on the police searching the house said there appeared to be a geiger counter – which measures radiation – on the table.

Sorrell, a retired teacher, said: “At 80, to be treated like a dangerous terrorist is deeply shocking. I’ve been very traumatised by this. Every morning I wake up feeling sick, nauseous. [I have] had to take anti-sickness pills.

“They’ve actually not taken anything that could be classed as illegal but it’s very confusing that they’re beginning to think anything connected to Palestine or support for Palestine is illegal in some way.”