Rene quote-
“There’s no legal requirement for the usual 10% +2mph “curtesy” we get.”
This is also a misnomer, that is the speed at which most Speed camera tolerances are set at.
If you’re caught by a radar set up in a van for instance, they will prosecute at that speed (see table below)
Below from Carbuyer site and my own experience ? (got speed awareness course for a brief 79 in a 70?)
When would you be offered a speed awareness course?
If you have been caught speeding, you will receive a letter informing you of the consequences. In many cases, you will be able to choose from three options: paying the fine and taking the points, going to court to settle it, or taking a speed awareness course with a slightly reduced fine and no penalty points.
You will be able to enroll on a speed awareness course if it is your first speeding offence or if you haven’t been caught in the past three years. You’re only eligible for a speed awareness course if the police offer it to you as a choice. On top of that, there are set speeds that qualify for a speed awareness course, so if you were speeding by more than these amounts, you won’t be given the option. The amount by which you can break the speed limit and still be eligible to take a speed awareness course is between 10% of the speed limit plus 2mph, to 10% of the limit plus 9mph.
30mph limit: speeding between 35mph and 42mph
40mph limit: speeding between 46mph and 53mph
50mph limit: speeding between 57mph and 64mph
60mph limit: speeding between 68mph and 75mph
70mph limit: speeding between 79mph and 86mph