The cameras are over head and were installed last week in connection with the roadworks due to start soon. They are both the west and east bound csides.
There are signs adjacent to the gantry saying Cameras Not In Use, well they were there on Friday evening, and there is no indicated speed limit lower than the normal upper limt for a motorway depending on the class of vehicle you are driving.
Interesting that your Road Angel indicated a non functioning camers. All very well but no substitute for good old fashioned COAST

.