Ever wondered what many embassies contain? There were serious health concerns about staff in the British Embassy in Moscow during the Cold War from all the stuff the Soviets were throwing at the building trying to work out what the occupants were up to.
Ever wondered what that odd superstructure box on a visiting warship parked in your local naval base had inside it?
Ever wondered why Britain was so keen to hang onto random colonial possessions and the Cyprus base areas? And why other Western countries didn't mind?
Embassies are full of secret spying equipment, and indeed spies. Foreign warships that come to visit "interesting" ports have been known to carry extra electronics intelligence equipment.
My point was that you don't have to imagine a foreign power having unknown surveillance equipment on your nation's soil. Unless you're in the most backwater nation on earth foreign powers will already be doing this.
Ever wondered what that odd superstructure box on a visiting warship parked in your local naval base had inside it?
Ever wondered why Britain was so keen to hang onto random colonial possessions and the Cyprus base areas? And why other Western countries didn't mind?