The UK has raised its terror threat level from “substantial” to “severe”, meaning an attack within the next six months is considered highly likely. The change means the threat level is at severe for the first time in four years. It came with a warning from the Home Office of an increased threat from individuals and small groups based in the UK.

Counter-terrorism in the UK centres on a strategy known as Contest – a key part of this is the Prevent programme. The primary objective of Prevent, as the name suggests, is to stop people becoming involved in terrorism or from supporting extremist ideologies.

As such, it is designed to deliver tailored early-intervention aimed at addressing risks of radicalisation, extremism and terrorism.

In my experience as a researcher in counter-terrorism studies, I have engaged extensively with Prevent practitioners. I have gained an insight into their work, which is carried out with commitment and dedication despite constraints in funding and resources.

A Prevent referral does not imply that someone has committed, or is suspected of committing, a criminal offence. Rather, it indicates that a professional with a statutory “Prevent duty” has raised concerns about someone’s behaviour, expressions or vulnerabilities. These professionals include teachers, healthcare workers and or social workers.

Recent data illustrates the scale of the programme: between April 2024 and March 2025, 8,778 people were referred to Prevent. This is the highest figure recorded since data collection began in 2015.

Notably, a significant proportion of these referrals involve young people, with 36% (3,192 cases) concerning children aged 11 to 15. A further 1,178 cases involved those aged 16 and 17.

The criteria for referral are broad, and they can include observable changes in behaviour, expressing extremist views, or signs of vulnerability that could make someone more susceptible to being radicalised.

Referrals are assessed by a panel that often include representatives from education, social services and law enforcement. In many cases, referrals do not progress beyond this initial stage. Instead, they may be signposted to other teams, such as social services, for more support.

But where there are still concerns, individuals may be offered support through the Channel programme. This is Prevent’s primary de-radicalisation mechanism. Channel is voluntary and confidential, and referrals can come from anyone and from any context. They are often issued by the police and education sector.

The support is tailored to the specific needs in each case and may include mentoring and mental health support. Participation is voluntary, and individuals can refuse to be involved or stop participating at any point.

Stigma and polarisation

Prevent is designed to be pre-emptive – intervening before criminal activity occurs. However, this breadth is also a source of ongoing controversy.

Critics argue that it can result in referrals based on ambiguous or misinterpreted behaviour. As such it has the potential to reinforce polarisation, particularly in relation to specific groups such as Muslims. This can clearly leave people feeling stigmatised, under surveillance or unfairly judged, particularly if they believe the referral was based on cultural, religious or political misunderstandings.

The scheme also has significant structural limitations as it functions as a time-limited intervention rather than a system of ongoing monitoring. Once a case is closed, the person is not subject to continuous oversight. This means that a previous referral does not eliminate the possibility of future risk – it simply means that the threshold for intervention was not met at that time.

It is important to remember that positive stories rarely get widespread attention. Every year, thousands of people in the UK receive early support and successfully disengage from radical and extremist ideologies.

Prevent operates in a difficult space between safeguarding and security, where risk is assessed before an offence occurs. While high-profile cases can amplify perceptions of failure, they do not reflect the full picture. Most referrals do not lead to further action, and many result in early, voluntary support that helps people disengage from harmful pathways.

At the same time, concerns around ambiguity and stigma remain valid. In short, rather than seeing Prevent as a measure of guilt, it’s important to recognise its limitations and its role as an early intervention tool.

Elisa Orofino does not work for, consult, own shares in or receive funding from any company or organisation that would benefit from this article, and has disclosed no relevant affiliations beyond their academic appointment.