Forgive me for sounding like a noob, but when your lights are on is there smaller lights on the inside, somewhat like fog lights? I may have seen it yesterday (around 4pm), went along Kelvin road, left onto Tonkin, then left onto welshpool after getting up to about 160 on the highway... I can't say I got the plates, so I can't be sure.. But they were standard plates on the car I seen.. So possibly? Sorry I couldn't be any more help.