Can Agree if you see what you think is a couple of mossos with a road side speed cam look again its a normal digital camera they photograph the rear number plate then check with the DVLA to see if it has up to date road tax, or if its SORNED or permanently exported, if not taxed they issue number plate lists to the Rozzers and pull you next time they see you, you can end up being clamped with a hefty fine!