Tuesday, September 1, 2026

Almost Half of UK Terrorism Arrests Since 9/11 Recorded in Past Year

Almost Half of UK Terrorism Arrests Since 9/11 Recorded in Past Year

Almost half of all terrorism-related arrests in Great Britain since the September 11, 2001 attacks in the United States were recorded in the past year, according to official Home Office figures.

The data shows that 6,539 people have been arrested for terrorism-related offences in Great Britain since 9/11. Of these, 3,021 arrests occurred in the year ending March 31, 2026, representing a 1,434% increase compared with the previous year.

The sharp rise followed the UK government’s decision to proscribe Palestine Action as a terrorist organisation in July 2025. The ban has resulted in thousands of arrests involving people accused of expressing support for the group.

Many of those arrested were protesters who displayed placards reading, “I oppose genocide, I support Palestine Action,” during demonstrations organised by Defend Our Juries.

Civil liberties organisation Liberty criticised the increase, arguing that the figures raise concerns about the broad use of Britain’s terrorism laws. The organisation said the current definition of terrorism could cover activities that many members of the public would not consider terrorist acts.

Defend Our Juries said arrests linked to support for Palestine Action had risen to more than 3,600. It said around 2,500 people had been charged under Section 13 of the Terrorism Act for showing support for a proscribed organisation.

At least 50 people have also been charged under Section 12, which relates to inviting support for a banned organisation and carries a maximum prison sentence of 14 years.

The British Home Office defended the enforcement of the law, saying that showing support for a proscribed organisation is illegal. It added that decisions to make arrests are operational matters for the police and are based on the circumstances of individual cases.

The proscription of Palestine Action remains the subject of a legal challenge, with the UK Supreme Court scheduled to hear the case in November 2026.

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