Police have made 200 arrests of people supporting banned group Palestine Action and four for assaulting officers as protesters gathered in central London.
Hundreds attended Saturday’s demonstration in Parliament Square, organised by Defend Our Juries.
The Metropolitan Police said it would arrest anyone expressing support for Palestine Action.
In a statement, Scotland Yard said 200 arrests were made for showing support for a proscribed organisation by 3.40pm “with more to follow”.
There were a further four arrests for assaults on officers.
The force said the detained protesters were taken to prisoner processing points in the Westminster area, and those whose details could be confirmed were bailed, with conditions not to attend any further protest in support of Palestine Action.
Those whose details were refused, or could not be verified, were taken to custody suites across London, the Met added.
The crowd, sat on the grass inside Parliament Square, could be seen writing “I oppose genocide, I support Palestine Action” on white placards at 1pm, with the vast majority remaining silent.
Several demonstrators carrying placards that read “Palestine Action terrorises Britain while Hamas hides in hospitals, schools and mosques”, briefly walked along the crowd before being led away by police officers.
Other clusters of protesters who were not holding placards gathered around the Mahatma Gandhi and Nelson Mandela statues in the square singing pro-Palestinian chants.
Arrest update: We have now made 200 arrests in Parliament Square this afternoon.
— Metropolitan Police (@metpoliceuk) August 9, 2025
We're aware of comments made by protest organisers which include misinformation. We've responded to those below: pic.twitter.com/SC2MGdk3pP
Officers were holding individual demonstrators sat on the edge of the grass before escorting them through swelling crowds to police vans parked on the edge of the square.
A separate group of officers attended a protester lying next to the fenced-off Emmeline Pankhurst statue.
They later began arresting protesters sat in the middle of Parliament Square.
The officers lifted the protesters – some sitting and some lying flat – off the ground before escorting them away.
Onlookers applauded the protesters and shouted “Shame on you” at the police making arrests.
Protesters who were still sat in the middle of Parliament Square stood up together at 2pm and held their placards in the air.
One person was also arrested at a separate Palestine Coalition march, which set off from Russell Square heading to Whitehall via Aldwych and the Strand.
The arrest was “for a placard showing support for Palestine Action”, Scotland Yard said.
Membership of, or support for, Palestine Action is a criminal offence punishable by up to 14 years in prison under the Terrorism Act 2000.
Earlier this week, the first three people to be charged with supporting Palestine Action in England and Wales were named.
Jeremy Shippam, 71, Judit Murray, 71, and Fiona Maclean, 53, have all been charged with displaying an article in a public place, arousing reasonable suspicion that they are a supporter of a proscribed organisation after their attendance at a previous demonstration last month.
Hundreds have been arrested in the wave of Defend Our Juries protests across the UK since the ban was implemented by Home Secretary Yvette Cooper last month.
A Home Office spokesperson said: “The Home Secretary has been clear that the proscription of Palestine Action is not about Palestine, nor does it affect the freedom to protest on Palestinian rights.
“It only applies to the specific and narrow organisation whose activities do not reflect or represent the thousands of people across the country who continue to exercise their fundamental rights to protest on different issues.
“Freedom to protest is a cornerstone of our democracy and we protect it fiercely.
“The decision to proscribe was based on strong security advice and the unanimous recommendation by the expert cross-government proscription review group.
“This followed serious attacks the group has committed, involving violence, significant injuries and extensive criminal damage.”
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