Teenager jailed after admitting possessing terrorist material

A teenager has been jailed after he admitted possessing terrorist material following an investigation by Counter Terrorism Policing London.

Dihan Rahman, aged 19 (15.09.06) of Southhall, downloaded guides on how to build bombs as well as content related to various terrorist ideologies, including extreme right-wing and Islamist material.

CTP London detectives uncovered the videos after they analysed his mobile phone and computer, including an encrypted hard drive.

Rahman also pleaded guilty to stalking two teenage girls and a female teacher.

Commander Helen Flanagan, head of CTP London said: “This case is yet another example of a growing and concerning trend of young people being drawn into extremist, violent and terrorist ideologies - principally from what they are exposed to and consuming online.

“Rahman’s actions towards his victims – two of whom were teenage girls - were completely unacceptable and I want to praise their incredible courage and resilience throughout this whole ordeal. I would also like to praise the actions of Rahman’s teachers, who contacted police with their concerns, which enabled us to intervene and investigate when we did.

“With the threat level now raised to severe, everyone can play their part to keep themselves and their communities safe. If you see or hear anything that doesn’t look or feel right, then please report it to us. Your information could help us save lives.”

For information and advice on the signs of radicalisation and how to contact police if you have concerns about somebody, visit www.actearly.uk

The investigation started after Rahman was accused of stalking and threatening two teenage girls. Rahman had attempted to date one of the girls, but she had turned him down.

From February to June 2024, Rahman bombarded her with messages on social media. In May, he posted images of the venue for the school prom and a photograph of a German Nazi soldier in a forest holding a gun.

Rahman then went on to harass another girl in a similar way. He also made a number of malicious complaints about a teacher.

Rahman was arrested again in November 2024 after CTP detectives uncovered that he had posted details of the two girls and female teacher online and suggested they were involved in a ‘conspiracy’ in relation to the investigation into him.

He was subsequently remanded in custody and pleaded guilty to three counts of possession of Indecent Images, contrary to S160 Criminal Justice Act 1988 and three counts of stalking, contrary to Section 4a Protection from Harassment Act 1997.

He pleaded guilty to three charges of possession of documents of a kind likely to be useful to a person committing or preparing an act of terrorism, contrary to section 58 of the Terrorism Act, 2000 on the second day of his trial at the Old Bailey in February 2026.

He was sentenced at the same court on May 6 to a custodial sentence of four years and six months. He must serve a minimum of two thirds of this sentenced in custody.