Britain is holding a record number of 275 people in prison for terrorism offenses at the end of June, with the majority convicted for Islamist extremism, according to Home Office data. This marks an increase from last year and surpasses previous peaks since records began in 2010. Of those incarcerated, 57% are associated with Islamist-extremist views, while 29% hold extreme right-wing beliefs. The surge in arrests follows the proscription of Palestine Action, which has led to a sharp rise in terrorism-related detentions; over half of all such arrests since 9/11 occurred within the past year.
Written locally by qwen2.5:14b on 2026-10-08,
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Story summary
As of June end, 275 convicted terrorists are imprisoned in Britain, marking a new record since data collection began in 2010, when there were only 126. This is an increase by seven percent from the previous year and surpasses the earlier peak of 273 recorded at the end of March. The majority, about 57%, adhere to Islamist extremist views, while around 29% have extreme right-wing beliefs. About 14% fall under 'other' ideologies. Following the banning of Palestine Action, a protest group, thousands have been arrested. Additional data from the Ministry of Justice showed that among those without specified ideology, four were categorized as 'far-left or anarchist', eight held multiple ideologies, and twelve were designated as 'other'. This surge highlights Britain's evolving approach to counterterrorism measures.
Written for “Terrorism Convictions Rise” on 2026-10-08,
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A record number of convicted terrorists are now locked up in Britain, with the majority holding Islamist-extremist views, new data shows.
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data → convict → views
There were 275 people in prison for terror offences at the end of June, the highest number since records began in 2010, when there were 126.
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records → be → 2010
Data released by the Home Office showed the number is up seven per cent since last year, and has surpassed the previous peak of 273 recorded at the end of March.
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number → release → March
The increase comes after the proscription of Palestine Action, the first direct action protest group to be banned under the Terrorism Act, which has led to thousands of arrests.
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which → come → arrests
According to the data, 57 per cent of those in jail for terrorism held Islamist-extremist views while 29 per cent had extreme right-wing beliefs.
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cent → accord → beliefs
Around 38 individuals (14 per cent) were classed as holding 'other' ideologies.
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individuals → class → ideologies
Separate data from the Ministry of Justice revealed that, of the 34 people in that category in March, four were classed as 'far-left or anarchist', eight held multiple ideologies, 10 had 'no ideology' and 12 were designated as 'other'.
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12 → reveal → other
The Home Office figures also revealed that more than half of all terrorism arrests in Britain since the 9/11 attacks have come in the past year.
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half → reveal → year
Pictured: anti-terror police raid a property in Eastbourne
More than half of all terror arrests in Britain since 9/11 have happened in the last year since the proscription of Palestine Action.
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half → picture → Action
Pictured: a protester is carried away by police
Tory grandee Sir Jacob Rees-Mogg spoke out against the proscription of Palestine Action earlier this week, calling it an 'overzealous' expansion of laws designed to prevent violence
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Mogg → picture → violence
Of the 7,385 people who have been arrested for suspected activity since the 2001 attacks, 3,867 happened in the year to June.
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3,867 → arrest → June
The vast majority of those (94 per cent) were linked to support for Palestine Action, which was proscribed in July last year.
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which → link → July
In the previous 12-month period, prior to the ban coming into force, some 234 terror arrests were made.
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arrests → come → force
Members or supporters of Palestine Action face up to 14 years in prison under the ban brought in by then-home secretary Yvette Cooper.
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Members → face → Cooper
In February, High Court judges ruled the proscription was unlawful.
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proscription → rule → February
The Home Office challenged the decision and saw it overturned in the Court of Appeal after judges found the ban on the organisation as a terror group was a 'justified and proportionate' interference on freedom of expression rights.
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ban → challenge → rights
Ms Ammori has since made a bid to take her case to the UK's highest court and vowed to go to the European Court of Human Rights if necessary.
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Ammori → make → Rights
Supreme Court judges are due to hear the challenge against the ban next month.
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judges → hear → ban
The decision to ban the group has come under criticism from both sides of the political fence.
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decision → ban → fence
Earlier this week, Tory grandee Sir Jacob Rees-Mogg told American journalist Tucker Carlson that banning the group had 'made the government look stupid'.
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government → tell → group
'We have historically protected freedom of speech and we are now attacking freedom of speech, and I'm deeply concerned about that,' he said.
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he → protect → that
'I'm very against banning things.
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I → ban → things
I would never ban things.
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I → ban → things
I'm not in favour of the way free speech is being policed in this country.
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speech → police → country
I happen to think this has been completely stupid.
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this → happen → ?
They banned [Palestine Action] and then they arrested elderly people who belong to it, which has made the government look stupid.
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government → ban → it
I mean, the reason this matters is that governments have power to stop terrorist organisations.
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governments → mean → organisations
Quite right, they need to have that power.
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they → need → power
But what they've done with Palestine Action is confuse the people who support it politically with the people who are bad people who want acts of violence.
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who → do → violence
And therefore they've arrested elderly people who, to my mind, are very silly people, but nonetheless are entitled to their view.
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who → arrest → view
I don't think the arrest of people for supporting a political view is right.
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arrest → think → view
I do think it is reasonable to arrest people who propose and prepare acts of terrorism.'
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who → think → terrorism
Some 52 terrorists were freed from jail in the past year.
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terrorists → free → year
Terrorists are not eligible to be freed early from jail as part of the Government's bid to tackle overcrowding.
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Terrorists → free → overcrowding
They still have to serve two-thirds of their sentence behind bars and face the Parole Board before walking free.
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They → have → Board
The Aporia
