I was following you down the M11 and your rear lights were faint until you hit a bump then they would get bright. Flickered quite a lot. Possibly a loose connection somewhere. Regards a lotus driver (the red one you couldn't shake off!) nice exhaust note though...
Yep that was me! Suspect needs new camshaft, hence inability to shake off elise!!! (only joking, straight line only!)
Thanks for info on lights - they seem to suffer after it's rained, so I'll get them checked out. Don't want any excuse for being stopped if I can help it.