South London Man Guilty of ISIS Bomb Manual Terror Case 2026

Key Points

• Shuja Gibraeel Mohsin, a 20-year-old man from Mitcham, South West London, was found guilty at the Old Bailey on Friday, June 19, 2026
• Police discovered a bomb-making manual and an Islamic State (ISIS) execution video on his mobile telephone
• Mohsin had sent the ISIS execution video to an online contact, according to the Metropolitan Police
• A USB stick revealed Mohsin joined chat groups linked to extremist Islamist groups including the Taliban, Hamas, and IS
• He was convicted of one count of possessing a document likely to be of use to a terrorist and two counts of disseminating terrorist material
• Mohsin was intercepted at Heathrow airport in January 2024 upon returning from Pakistan
• He was initially released but authorities later seized his phone and USB drive
• Mohsin was apprehended in March 2024, with his computer taken for examination
• Further questioning occurred in July 2024; charges were approved by the Crown Prosecution Service in April 2025
• Sentencing is scheduled for August 14, 2025
• Commander Helen Flanagan, head of Counter Terrorism Policing London, stated Mohsin began accessing extremist material at age 14 or 15
• Officials warn this reflects a growing trend of children and young people being radicalised online
• Parents are urged to be vigilant about children’s online activity and visit www.actearly.uk for guidance

Mitcham (South London Times) June 20, 2026 – A 20-year-old man from Mitcham in South West London has been found guilty of sharing terrorist videos and possessing information about plastic explosives, marking another serious counter-terrorism case in South London. Shuja Gibraeel Mohsin was convicted on Friday at the Old Bailey of possessing a document likely to be of use to a terrorist and two counts of disseminating terrorist material.

What Exactly Did Police Find on Mohsin’s Phone and USB Stick?

As reported by the London Standard, investigators discovered a bomb-making manual on Mohsin’s telephone, alongside a so-called Islamic State execution video that he had sent to an online contact.

The Metropolitan Police confirmed that a USB stick also showed Mohsin had been viewing material and joined various chat groups linked to extreme Islamist groups, including the Taliban, Hamas, and IS.

The evidence revealed that Mohsin was actively engaging with extremist content through group chats and downloading material associated with designated terrorist organisations. This digital footprint formed the core of the prosecution’s case at the two-week trial.

How Did Mohsin’s Caseunfold From Heathrow to Old Bailey?

According to the London Standard, Mohsin was intercepted by counter-terrorism officers at Heathrow airport upon his return from Pakistan in January 2024.

While he was initially released, authorities subsequently seized his phone and a USB drive, uncovering evidence of his participation in group chats and engagement with content associated with extremist Islamist organisations.

Mohsin was apprehended in March 2024, with his computer taken for examination, and he faced further questioning in July 2024 regarding the materials found on his devices.

The Crown Prosecution Service approved charges against him in April 2025, leading to the trial at the Old Bailey.

What Specific Charges Was Mohsin Convicted Of Under the Terrorism Act?

As reported by the London Standard, after a two-week trial, Mohsin was declared guilty on June 19, 2026. He was convicted of:

• One count of possessing a document that could assist a terrorist, violating section 58 of the Terrorism Act (TACT) 2000, specifically concerning the bomb-making guide
• Two counts of disseminating terrorist materials in breach of section 2 of the Terrorism Act (TACT) 2006, related to the ISIS execution videos he shared with an online associate

These charges reflect the seriousness of both possessing terrorist-related material and actively distributing it to others.

When Will Mohsin Be Sentenced and What Did Commander Flanagan Say?

Sentencing is scheduled for August 14, 2025. Commander Helen Flanagan, head of Counter Terrorism Policing London, stated:

“Our investigation showed that Mohsin was being drawn into extremist and terrorist material and ideologies from when he was only 14 or 15 years old”.

She continued:

“This is reflective of a growing trend and concern over children and young people being radicalised and accessing extremely dangerous and violent terrorist ideologies and material online”.

Commander Flanagan emphasised the importance of parental vigilance:

“I urge you to engage in discussions, to be curious about your children’s internet use, and if you have any concerns, help is accessible through the ACT Early website”. She warned that “there are significant and severe repercussions for those downloading and sharing terrorist material online, situation that Mohsin now confronts”.

Why Are Counter-Terrorism Officials Urging Parents to Monitor Children’s Online Activity?

As reported by Counter Terrorism Policing London in a November 2025 statement, referrals to Prevent in London have increased by more than a third (38 per cent) in the last year.

This increase has mainly been driven by a record number of referrals due to concerns about the vulnerability to radicalisation of children under the age of 18.

According to Counter Terrorism Policing,

“many children referred to Prevent have no identifiable ideology, but they have accessed terrorist-related content online, or developed a fascination with extreme violence they have found via internet searches or social media”.

The Home Office reported a record-high number of terrorism arrests for those aged 17 and under in the year ending June 2025.

Commander Flanagan stated parents should visit www.actearly.uk for guidance on recognising signs of radicalisation and reporting concerns to police.

Explore More Mitcham News

Leon Anderson Murder: Killer Gets Life for Mitcham Stabbing 2026

Mitcham Eastfields Campaign Grows as Residents Demand Safety and Investment Action

What Broader Trends in Youth Radicalisation Does This Case Reflect?

As reported by Counter Terrorism Policing in November 2025, “the latest Prevent statistics should act as yet another warning about the risks posed to our children by the online environment, and the extremist content they’re being exposed to”.

The organisation warned:

“This year a record number of young and vulnerable people have been referred to Prevent because of concerns over radicalisation, with current trends indicating that these numbers will increase even more in the future”.

Historical data from 2023 shows that 72 per cent of Prevent referrals were under the age of 30, with 88 per cent male, and the majority were young men becoming interested in violent extremism without a clear ideology. After “mixed, unstable or unclear” ideology, the most prevalent ideology exhibited by those referred was Islamist (24%), followed closely by right-wing radicalisation (22%).

Background of the Development

This case represents a significant counter-terrorism conviction in South London involving a young man from Mitcham who accessed extremist material from adolescence.

Shuja Gibraeel Mohsin’s journey from initial interception at Heathrow in January 2024 to conviction at the Old Bailey in June 2026 demonstrates the thorough investigative process followed by Counter Terrorism Policing London.

The case centres on section 58 of the Terrorism Act 2000 (possession of documents likely to assist terrorism) and section 2 of the Terrorism Act 2006 (dissemination of terrorist material), both critical provisions in UK counter-terrorism law.

The evidence uncovered – including a bomb-making manual, ISIS execution videos, and membership in chat groups linked to the Taliban, Hamas, and IS – formed the foundation of the prosecution’s case.

Commander Helen Flanagan’s statement highlights that Mohsin’s radicalisation began at age 14 or 15, aligning with broader Prevent statistics showing increasing referrals of children under 18.

The Crown Prosecution Service’s approval of charges in April 2025 followed extensive device examination and multiple questioning sessions.

Prediction: How This Development Can affect South London Families and Parents

This conviction will likely affect South London families and parents in several significant ways. First, parents in areas like Mitcham and surrounding South West London boroughs may become more vigilant about monitoring their children’s online activity, particularly given Commander Flanagan’s explicit warning about radicalisation beginning as early as age 14 or 15.

Parents with teenagers may increase scrutiny of their children’s phone usage, social media accounts, and chat group memberships, especially since 38 per cent more Prevent referrals in London now concern children under 18. The case demonstrates that possessing terrorist material – even without committing violent acts – carries “significant and severe repercussions” as Mohsin now faces.

Families considering international travel, particularly to countries like Pakistan, may face additional scrutiny from counter-terrorism officers, as Mohsin was intercepted at Heathrow upon returning from Pakistan. This could affect travel plans and airport experiences for South London families.

Schools and educational institutions in South London may intensify discussions about online safety and radicalisation risks, potentially incorporating ACT Early guidance into parental information sessions.

The record-high terrorism arrests for those aged 17 and under may prompt schools to implement stricter monitoring of student digital activity.

Community organisations in South London boroughs may see increased demand for resources on recognising radicalisation signs, as parents seek guidance through www.actearly.uk.

The case reinforces that children “with no identifiable ideology” can still access terrorist content online, making vigilance essential for all families regardless of background.