The word is …during training Kim triggered the average speed cameras showing 53.5 over 4 miles
That meant
faces at each mile marker .
The M6 has extra overhead and portable lighting for the road workers.
It can be quiet just before midnight ...allowing a clear run .
Highways will probably have the racing number on the video and still shots !
I think you have a 6% allowance before a ticket arrives in the post
Rich Forest has done a lot of night driving on the motorways ...perhaps he can give his opinion