Did Britain suffer incidents with rogue target drones?
Short answerYes. Queen Bee targets sometimes left their intended area and crossed into foreign airspace.
NotesThe Queen Bee gave British forces a reusable target for anti-aircraft training and remote-control development. Early control systems were imperfect, so the aircraft could depart the intended range. British examples reportedly crossed into foreign airspace even if the specific American episode was not repeated in the same form. Uncrewed aviation brought navigation and sovereignty problems long before modern drones.