Police have made 474 arrests in London after crowds turned out for a Palestine Action demonstration.

Metropolitan Police said 466 were detained under the Terrorism Act for showing support for a banned group.

Eight more people were arrested for other offences, including five for assaulting officers.

The Met said it was the most arrests it’s made related to a single operation in at least the past decade.

Organiser of the event, Defend Our Juries, earlier said up to 700 people were at the event in Parliament Square and claimed police were preparing for the “largest mass arrest in their history”.

The group said those arrested included former Guantanamo Bay detainee Moazzam Begg, NHS workers, quakers and a blind wheelchair user.

The Met said a “significant number of people” at the event were seen “displaying placards expressing support for Palestine Action”.

Home Secretary Yvette Cooper said: “The right to protest is one we protect fiercely but this is very different from displaying support for this one specific and narrow, proscribed organisation.

“Palestine Action was proscribed based on strong security advice following serious attacks the group has committed, involving violence, significant injuries and extensive criminal damage.”

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Palestine Action supporters arrested at protest

Police said those arrested had been taken to processing points in Westminster and any whose details could be confirmed were bailed on condition they didn’t attend further Palestine Action support events.

Others whose details could not be verified, possibly because they refused to give them, were taken to custody suites across London.

A woman is dragged away after attending the Palestine Action protest in Parliament Square. Pic: PA
Image:
A woman is dragged away after attending the Palestine Action protest in Parliament Square. Pic: PA

The protests have put a strain on authorities’ capacity to cope.

Sky News understands senior leaders in the prison service, known as “Capacity Gold”, met today to discuss how to deal with the large number of arrests as the male prison estate is close to full.

It’s understood 800 inmates were moved out of the busiest jails in and around London beforehand.

‘We felt compelled to speak out’

The first of the arrests began just before 1pm, when a man waving a placard that read “I support Palestine Action” was stopped by police, writes Gurpreet Narwan, reporting from Parliament Square.

Officers told him he was showing support for a terrorist organisation, searched him and ushered him away.

The action soon escalated. Among the people arrested today were a number of elderly people, a blind man in a wheelchair, and a teenager.

They were protesting peacefully, with a number of people pointedly seating themselves below statues of Mahatma Gandhi and the suffragette Millicent Fawcett.

They told Sky News that they were fully expecting to be arrested but that they felt compelled to speak out and defend the right to protest.

One protester said: “I don’t think I’m a criminal. That’s not the person I am.”

However, he said he was being guided by his faith and his conscience.

Things calmed down after a few hours but there was a heavy police presence well into the afternoon and early evening.

Read more:
What does proscribing a group mean?

Legislation to ban Palestine Action came into force on 5 July, making it a criminal offence to show support for the organisation, carrying a prison sentence of up to 14 years.

Defend Our Juries said earlier this week the protest would still go ahead, following several similar demonstrations since it was outlawed last month.

On Saturday, a spokesperson said “Palestine Action and people holding cardboard signs present no danger to the public at large”.

Protesters write on placards for the Lift the Ban campaign rally on Saturday. Pic: PA
Image:
Protesters write on placards for the Lift the Ban campaign rally on Saturday. Pic: PA

Human rights advocates Amnesty International described the arrests of so many people under UK terrorism law as “deeply concerning”.

Another march organised by the Palestine Coalition, which is a separate group, set off from Russell Square and assembled on Whitehall.

The Met Police said one person had been arrested there for showing a placard in support of Palestine Action.

A man is detained by police officers in Parliament Square. Pic: PA
Image:
A man is detained by police officers in Parliament Square. Pic: PA

Earlier this week, three people charged as a result of illegal Palestine Action activity were named.

Jeremy Shippam, 71, of West Sussex, Judit Murray, also 71, of Surrey, and Fiona Maclean, 53, of Hackney in east London, will appear at Westminster Magistrates’ Court on 16 September.

The ban on Palestine Action faces a legal challenge in November after the High Court granted a full judicial review to Palestine Action co-founder Huda Ammori.