I think the point of it being a 735 was that there were lots of them registered in the area - thus his particular one didn't stand out from the crowd. If it'd been an M5/745/750, there would be less of them in the area, making it easier for the copper to track him down!
Maybe he should've had an 750 with 735 badges - but that'd open another can of worms just like the re-badging thread elsewhere on here!
