In the UK the Police will not normally prosecute for speeding unless you are driving at the limit plus 10% plus 1 mph.

Allowing for an average 3% speedometer error on older cars - modern ones are better - that means to be caught the speedo will be showing 35mph.




Peter,
66, 2016 Porsche Boxster S
No longer driving Tarka, the 2014 Plus 8...