Further
The 10% leeway is an ACPO guideline, not law, so it depends on whether or not that force follows it in that area.
One's speedo can also read up to 10% over, so if one really want to play "legally nawty" one could zip along at an indicated 85 and probably get away with it.
Although one would still be committing a criminal act and from there it's a slippery slope to raping puppies.
Or something.
(SpangleDangle >->)))'>, Thu 10 Feb 2011, 23:43, 1 reply)

indeed! i used the word "probably" for that there reason!
if raping puppies is yo thang then git on in dar and break that there loh...
etc
last year i used my gps satnav to calibrate my tacho over a 1700mile journey and was appalled by the results.
DO NOT TRUST THE DIAL ON YOUR DASHBOARD.
unless you think it will stand up in court...
( blaireau69 , the Cumbrian Travis Bickle., Fri 11 Feb 2011, 0:05, closed)

I think...
That all car speedos over read the speed to some small extent. So, when doing 70 you're really only doing about 65.

I think there are laws in place to stop car manufacturers creating speedos that under read your speed because it would be very unfair on the motorist to get done for speeding when his only available information is wrong. Hence the manufacturers err on the side of caution, making the speedos over read.

Or something or nothing. You wot?
(Woodlouse say it with flowers. Send her a Triffid, Fri 11 Feb 2011, 1:09, closed)

Ha ha!
Your closing line reminded me of the exceptionally cultured "lower class" character played by Paul Whitehouse in "Harry and Paul"... he tries to cover this in a similar manner... or summat. *snort*
(Stiltzkin, Fri 11 Feb 2011, 11:02, closed)