Any leeway with camera van speeds?

[brrapp]

Caught yesterday by a camera van. I was doing an indicated 38 in a 30 (its been a 60, a 50, a 40, and now a 30 limit over the last 20 years with no additional building or development in that time but that's another story) I checked my speedo against two different sat navs and 38 is between 34 and 35 in real life.
Do the camera vans give any leeway (2mph+10%)? Or is it strictly done on exact recorded speed?
In Scotland so no 'get out of jail' course option.
Definite points or not?

[brrapp]

Just to clarify, the 'indicated' speed of 38 was on my speedo. I checked the accuracy of my speedo against sat nav later and found 38 to be 34.5 ish. No idea yet what was showing on their machinery.

[brrapp]

Can I simplify my original question?
I was probably doing pretty close to 34.5 mph.
This would have come in under the old ACPO guidelines, 30mph+10%+2mph =35mph.
Do these guidelines still apply to camera vans? If so I won't get done, if not , I will...unless there is some leeway.
In Scotland so no SAC option .

[brrapp]

SS2. said:

brrapp said:

I was probably doing pretty close to 34.5 mph.

Little choice but to sit it out for a couple of weeks and see if anything unwelcome drops through the Registered Keeper's letterbox.

That's two and a half weeks now. Not heard anything. I guess I was below the threshold. Phew!