Thanks for all the advice. I think Im going to but a Witter towbar, fit it myslef with a bodyshop mate then buy a bike rack and see how it looks, i.e can you still see the lights. My concern is the French Police pulling me saying they cant see my brake lights.
Scott, I used to meddle with cars but this thing just seems to scare me. The mate at Audi said they had to rectify someones **** up when they tried to wire up electrics and it cost £3000 to put it right.
I seem to remember a trailer board on dragons den that had little suction cup sensors that stuck to the lights in relevant places and activated the trailor board lights at the relevant times. I remember it was a young kid that got sponsored, not sure where you would buy one from, but i recon that would solve your wiring problems.