With that though phil, I thought that they give you the benefit of the doubt that couple mph. If your speedo says 70, their gun says 72 who is to say who's in the wrong? Thats why I always believed they gave you a percentage of leaniency. Although with a clearcut no like 76/77 in a 70 thats quite right in a resulting fine etc. The offence is strict liability, your responsible for your speedo as you are your tread depth, your lights, insurance, MOT etc.... Yes you are unlikely to get a ticket at 72 but it doesnt matter what you say to the officer if his gun has you over the speed limit. My point is, his whole topic is moot given the nature of Road Traffic Offences, theyve chosen to prosecute him, thats it. I did law and ting, know hows to copy and paste from wiki init....