OK.... I got caught (with three points added to my Licence on the A52 between Grantham and Notts !!
The speed limit is 60mph in the single carrageway section and I got done for doing 82mph in a ........ wait for it........ Daewoo Matiz (which I thought was impossible according to the laws of Physics !!

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The SPECS start on the dual carrageway at Gamston (where the dual carrageway is and where the speed limit IS 70mph) and continue all the way on the A52 onto the single lane section (where the limit is 60mph).
You can go through the first camera doing 150mph if you want and you won't get caught... it's when you pass the SECOND camera that the laws of maths and average speed/distance take over
The Editor