M1 speed cameras

Has anyone else noticed that they’ve finally installed the variable speed limit cameras on the 4 lane section of the M1 around J25 -J28. The same type that’s on the M42 around Birmingham.

I do not know whether they are exactly the same, because when there is a speed limit displayed, it does not have a red circle around it as they do on the M42, which may make the speed limit unenforcable, or does it?
I have gone through this section with an “advisory” 50 displayed, but the road was clear and all cars were doing 70+ - no ticket received!

Not working yet i go pass every day and there signed up as camera not in use :grimacing: