[Bolding mine]

Child protection officials been criticised after warning parents that young people who take issue with government policy or question what they are told in the media may have been radicalised by extremists.

A leaflet drawn up by an inner-city child safeguarding board warns that “appearing angry about government policies, especially foreign policies” is a sign “specific to radicalisation”.

[...]

The relevant section of the anti-extremism leaflet reads in full: “The following could describe general teenage behaviour but together with other signs may mean the young person is being radicalised: Out of character changes in dress, behaviour and changes in their friendship group; Losing interest in previous activities and friendships; Secretive behaviour and switching screens when you come near.”

It continues: “The following signs are more specific to radicalisation: Owning mobile phones or devices you haven’t given them, Showing sympathy for extremist causes, Advocating extremist messages, Glorifying violence Accessing extremist literature and imagery, Showing a mistrust of mainstream media reports and belief in conspiracy theories, Appearing angry about government policies, especially foreign policy.”

The document urges parents who are worried about their children to contact the police or the local area's anti-extremism coordinator.