The guidance appears in Prevent’s official “refresher awareness” course, a counter-extremism training module hosted on the gov.uk website. The material lists “cultural nationalism” as one of the “most common sub-categories of extreme Right-wing terrorist ideologies.
The "Prevent Duty Refresher Course" identified "cultural nationalism" as being the idea that “Western culture is under threat from mass migration and a lack of integration by certain ethnic and cultural groups," it describes. The Prevent program lists it alongside “white/ethno-nationalism” and “neo-Nazism” in related subcategories. According to the course material, these ideologies involve the view that demographic and cultural changes pose “an existential threat” to white people or “Western culture.”
Critics argue that the inclusion of “cultural nationalism” goes far beyond identifying violent extremism and instead labels concerns about immigration or assimilation as terrorist views. Social media users accused the government of equating patriotism with extremism, with one post saying, “I guess that makes me a terrorist then.”
The controversy comes as new United Nations data show the UK is projected to see the largest population growth among major European nations by 2100, driven by immigration. The UN’s World Population Prospects report estimates Britain’s population will increase 6.8 percent, from 69.6 million today to 74.3 million by the end of the century, while other European nations are expected to decline.
The report attributes the UK’s growth primarily to continued high net migration, projected to remain above 100,000 annually through 2099. Without migration, the report says, the UK population would fall below 50 million—its lowest level since the 1950s.
The Office for National Statistics (ONS) has similarly reported that an influx of 10 million immigrants within a decade could raise the population to 72.5 million by 2032, representing a 7.3 percent increase in just ten years.




