But there have already been trials of speed limiters based on GPS technology this year. I think there is a voluntary scheme to use it at the moment in the UK.

I would like to know what is in the car etc. But also feel that it is hopefully a help to me to "prove my innocence". Like carrying a camera with you or even an incar video recorder or caught on cctv. It can only be an aid and not the proof but it can only help.