Most cars speedos aint that accurate (unlike a traffic cars)
say 5-7 mph out at 70
So say your car was showing 85 that probs only a genuine 78mph and as they have to allow you a 10% discrepency either way they cant do you untill a genuine 77 mph so would be hard for them to prove it was a worthwile tug for 1 mph over what you could be done for.

Like on here so many people say how lucky they are cos they was "doing like a ton" but only being reported for 85 etc, not cos the cops are feeling generous or how quick they asjusted their speed (cops probs been following em for ages) but cops are reporting a TRUE speed not some shonky old cars speedo reading. People seem to understand this when people quote the top speeds of there cars saying it was "only" a speedo reading, but forget it when they think they got off lite


OR at least hope so cos tend to drive to my sat nav speed rather than my speedo and then push it to say a sat nav reading of 76 mph, which generally has my speedo between 85 and 90 lol bet i wont be laughing one day tho, but aint had nowt thru when driving thru gatso with speed restriction of 50 at sat nav reading of 54 and speedo reading of about 60


Steve