Netflix's return of *The Gentlemen* — in which a duke inherits a hidden cannabis farm beneath his family's cash-strapped estate — has drawn attention to a string of real drug operations uncovered in genuine British stately homes. Investigators have found illegal production facilities ranging from cannabis farms to unlicensed medicine factories hidden inside country houses, highlighting the severe financial strain many historic estates face as they struggle to cover soaring maintenance costs from dwindling traditional income sources.

Among the cases is Moulton Grange in Northamptonshire, a Georgian wedding and events venue, where a raid on 28 May uncovered more than 12,000 doses of suspected illegal weight-loss injections, including tirzepatide and retatrutide, in what regulators called the UK's largest such seizure. Two men, both 29, were arrested and later released, while the property's owners made no comment. Other properties implicated include Plas Glynllifon, a 102-room Welsh mansion once visited by King Charles, and The Flass, a Grade II-listed Cumbrian house where a cannabis operation was valued at £5.2million, underscoring how upkeep costs — which can exceed £1million a year — leave some grand estates vulnerable to exploitation by criminal groups.