Historic Mansion Hosting King Charles Ball Uncovered as Major Cannabis Farm
North Wales Police have uncovered what they describe as a significant cannabis cultivation operation inside the historic Plas Glynllifon mansion near Caernarfon in Gwynedd. The discovery was made during the execution of a Misuse of Drugs Act warrant on Tuesday, 7 April 2026, revealing approximately twelve rooms on the top floor being used to grow what officers characterized as fairly mature cannabis plants.
A Property with Royal Connections
The Grade I-listed Plas Glynllifon is a privately-owned mansion originally constructed in the 1830s, possessing notable historical significance. The property once hosted a prestigious ball for King Charles following his investiture as Prince of Wales in 1969, marking it as a location of considerable heritage value. This royal connection makes the discovery of illegal drug cultivation activities within its walls particularly striking and concerning for authorities.
Extensive Modifications and Damage
Police Superintendent Arwel Hughes provided detailed observations about the state of the property following the raid. He confirmed that the building's electrical systems had been manipulated and its water supply diverted to facilitate the cannabis farming operation. These unauthorized modifications were carried out on a structure that was already in various states of disrepair, compounding the damage to this protected historic site.
Ongoing Investigation and Expected Arrests
North Wales Police have announced they will maintain a presence at the Plas Glynllifon site for several days to continue their enquiries and conduct necessary forensic work. Authorities have expressed strong confidence that arrests will be made in connection with this sophisticated drug cultivation operation. The investigation remains active as officers work to identify and apprehend those responsible for establishing and running the cannabis farm within the historic mansion.
The case highlights the ongoing challenges law enforcement faces in combating organized drug production, even within properties of significant cultural and historical importance. The juxtaposition of a location once associated with royal celebration now being used for illegal activities underscores the diverse nature of criminal enterprises operating across different types of buildings and communities.
