About 15 years ago, there was a TV Licensing van that was often parked around the corner from my house. I vaguely recall that it said "detection unit" on the s

About 15 years ago, there was a TV Licensing van that was often parked around the corner from my house. I vaguely recall that it said "detection unit" on the side or something similar, and it had heavily-tinted windows. However, if you went right up to it and peered hard enough through the windows, you could see that it was just a regular minibus with seating and no equipment inside.