A 21-year-old British man from Howden, East Yorkshire, has been convicted of planning a terrorist attack. The case underscores the persistent threat of self-radicalized individuals inspired by extremist ideology propagated through social media platforms.
Jordan Richardson was found guilty on November 3, 2025, following a three-week trial at Leeds Crown Court. He was convicted of preparing an act of terrorism as well as “the collection of information likely to be useful to a person committing or preparing an act of terrorism and distributing terrorist publications.” Sentencing is scheduled for December 15, 2025.
Counter Terrorism Policing North East, supported by Humberside Police, arrested Richardson on December 19, 2024, following an intelligence-led operation. At the time of arrest, officers discovered handwritten attack plans in his backpack, including detailed instructions for manufacturing mustard gas. A search of his residence yielded weapons including a crossbow, crossbow bolts, and a combat-style knife.
The case demonstrates an alarming radicalization trajectory. Richardson converted to Islam in early 2024 and rapidly adopted extremist views. Within months, he was actively participating in an Instagram group where he shared violent ISIS propaganda, including beheading videos, Al-Qaeda bomb-making instructions, and antisemitic and homophobic content.
Evidence presented at trial showed Richardson:
- Identified himself online as a terrorist
- Researched explosive manufacturing techniques
- Discussed potential targets, including Meadowhall shopping centre in Sheffield
- Investigated travel to conflict zones in Palestine, Syria, and Iraq
- Posted videos overlaid with text glorifying violence
Prosecutors noted Richardson “regularly expressed a wish to kill Jews” and searched for ways to volunteer for Hamas from the UK. One note recovered during his arrest read: “Throw all grenades into crowd, shoot bystanders, stab anyone who comes close, do not get taken alive.”
Key Takeaways for Homeland Security Professionals
Self-Radicalization Speed: Detective Chief Superintendent James Dunkerley, Head of Counter Terrorism Policing North East, emphasized how quickly Richardson radicalized: “In just a few short months, Richardson went from being a new convert to Islam, to being a committed and dangerous extremist.”
Online Facilitation of Real-Life Threats: The case illustrates the real-world danger of terrorist content circulating on mainstream social media platforms. Richardson used Instagram to consume and disseminate extremist material and connect with like-minded individuals.
Defense Strategy Rejected: Richardson attempted to blame social media algorithms for the content found on his devices and claimed he was “role playing” online as escapism. The jury rejected this defense, finding him motivated by genuine extremist ideology and fully responsible for his actions.
Continued Commitment: Even while on remand awaiting trial, Richardson told a prison officer he supported the so-called Islamic State, demonstrating persistent ideological commitment.
Community Vigilance is Essential
British authorities continue to emphasize the critical role of public awareness in preventing terrorist attacks. Detective Chief Superintendent Dunkerley urged: “Everyone has a part to play in defeating terrorism. I would urge the public to remain vigilant, and if you see or hear something that doesn’t feel right, trust your instincts and report it in confidence at gov.uk/ACT.” Here in the U.S., suspicious activity should be reported via 911. For more information on what constitutes suspicious activity, visit the Department of Homeland Security’s “If You See Something, Say Something®” website.
This successful intervention prevented potential mass casualties and highlights the importance of intelligence-led operations combined with community reporting in identifying and stopping terrorist plots before execution.