There have never been so many referrals to Prevent, the Government’s counter-radicalisation programme. According to Home Office figures published this week, there were 10,293 referrals in the year to September 2025, up 39% on the previous year. Extremism, it seems, is surging. There is just one problem with that neat conclusion: referrals are not diagnoses. They are concerns passed on to the system.

Let’s start with the “extreme Right-wing” category, which produces the most striking figures. Such concerns made up 20% of referrals, with numbers rising from 1,480 to 2,103. More revealingly, once filtered through the system, these accounted for 42% of cases ultimately adopted by Channel, the voluntary anti-radicalisation programme. MI5 says “extreme Right-wing” terrorism is on a “steadily rising trajectory”, so there appears to be a genuine threat.

That is only half the story, however. The Home Office acknowledges that the rise may partly reflect heightened awareness after the Southport murders of 2024, while former terror watchdog David Anderson has previously linked the sharp jump in early 2025 to publicity surrounding Axel Rudakubana’s trial. Referrals therefore measure attention as well as threat.

A closer look provides an even stranger picture. Of the total referrals, 56% had no identified ideology. Another 8% concerned a fascination with extreme violence or mass-casualty attacks where no ideology was present, while 3% involved multiple ideologies with no dominant one. Prevent now works with 16 categories, including Islamism, extreme Right-wing and Left-wing extremism, but also incels, violence fascination and cases where ideology simply cannot be identified. Parliament’s Home Affairs Committee warned this year that Prevent is becoming saturated with non-ideological cases.

Since February, Home Office guidance has made explicit that an identifiable ideology is not required for a Prevent referral. That clarification came after the period covered by these figures, so it did not cause this rise. But it confirms how broad Prevent’s remit has become, and how little the raw total tells us about the true extent of ideological contagion.

There is already one obvious mismatch. MI5 says Islamist terrorism remains Britain’s primary terrorist threat. Yet Islamism accounted for only 8% of Prevent referrals, with numbers actually falling from 945 to 860. That does not show Islamists are being missed. MI5 investigations and Prevent referrals measure different things. But that is precisely the point: the referral table is not a league table of Britain’s terrorist threat.

More awkward still is what barely appears in the new figures. Just 32 referrals were classified as “Left-wing extremism”, with another 18 classed as “anarchist”. That is a strikingly modest national total. On some Saturday afternoons in Westminster, judging by the rhetoric alone, 32 looks like a headcount from a single street corner. While protest is not the same as extremism, the disparity is still difficult to ignore.

The figure looks even more curious against the wider political climate. The killing of Ann Widdecombe, the former Tory minister and Reform UK spokeswoman, is being investigated by Counter Terrorism Policing, with a possible political motivation still an active line of inquiry. While the motive remains unestablished, her death was openly celebrated by users on Bluesky, the Left-leaning social media platform. Reform leader Nigel Farage, meanwhile, says he receives more than 300 threats a month, although the political provenance of those threats is unknown.

None of this proves Left-wing extremism is being systematically under-referred. But it raises a legitimate question about what produces a referral in the first place. It doesn’t help that over a third of those referred were aged 11-15.

Though there may genuinely be an increase in threat, the new figures are seemingly being driven by more reporting, while events plainly sharpen institutional attention. Perhaps the most revealing thing about this record year is not what Prevent’s statistics tell us, but what they don’t.