Gav very true, and no your insurance is not invalid if your speeding, The only people who wouldn’t like this being fitted are the people who cost everyone money, the honest folk wouldn’t really mind. And yes if you hit the brakes for no good cause, I.E you were speeding and you had just noticed it so hit the brakes without doing your mirror checks to ensure your actions were safe(as per the driving test) then yes the 3rd party could claim it is your fault. The only person who controls your speed is you, we all know the law, We have all seen hikes in the recent months, Mostly down to PPI claims, However if I said on average your insurance goes up 19% PA because of younger drivers, why should YOU pay for THEM? I personally like this Tachograph idea it is far more sensible than the “limit the engine” rubbish as a 1.1 saxo can still crash into a wall at 70-just like a BMW can