So just what IS the limit on UK motorways?

I have always been led to believe that the plods didn't care until you broke 90, but how are these cameras set?

And what about average speed cameras, how are they configured?

I have to confess I have done the speed awareness course for being nabbed at 38 in a 30 zone in my people carrier, and in hindsight I think that the course should be a compulsory part of driver training.

I actually drive slower in the Mog because it always feels at least 10mph faster with your arse inches from the ground and the wind in what remaining hair I possess.