A far-right extremist who operated a Telegram group distributing terrorist material whilst manufacturing weapons at his London flat has been imprisoned for 15 years.
Robert Adamski, 29, was convicted of four counts of disseminating terrorist publications and possession of a document for terrorist purposes following a two-week trial at Woolwich Crown Court in October 2025. He had previously admitted two counts of possessing a prohibited firearm.
Counter Terrorism Command officers discovered extremist flags and images of Adolf Hitler when they raided Adamski’s Leyton home in July 2024. An ‘SS’ flag was among items seized during the search.
The raid also uncovered partially completed 3D-printed weapons, including components of a 9mm calibre semi-automatic rifle. Police located parts of a second firearm, identified as a Harlot point 22 long rifle single shot pistol, which was at a more advanced stage of production.
Forensic examination of the Harlot pistol revealed it was missing certain operational components. However, investigators found evidence that Adamski had been conducting online searches for the missing parts. A firearms expert subsequently assembled the weapon and confirmed it was capable of discharging ammunition.
Analysis of Adamski’s electronic devices uncovered extensive research into 3D-printed firearms and manufacturing techniques. Digital files on his computer contained manuals for producing the weapons, whilst software on an SD card connected to his printer showed active use. Credit records confirmed he purchased a 3D printer in June 2024.
Prosecutors presented evidence showing Adamski had created and administered a Telegram account where he shared documents with group members. The material was designed both to encourage terrorist acts and provide instructions for carrying out such activities.
His mobile phone and laptop contained searches and references to known extremists, which the prosecution argued demonstrated ideological motivation. The jury heard this online activity formed part of a broader pattern of extremist intent.
Adamski received his sentence on 28 November 2025, which includes a two-year extended licence period.
Bethan David, Head of the Crown Prosecution Service’s Counter Terrorism Division, stated that unlawful manufacture and possession of 3D-printed firearms represent a significant and evolving threat to public safety. She noted the case demonstrates growing risks from emerging technology in 3D printing, adding that the CPS will continue working closely with law enforcement to prosecute such criminality.
