I've heard of no Home Office Approval being granted - but I wouldn't surprise me if they were attempting to get it.
One problem is that the further away from the camera the lane is the lower the speed recorded - so it's not consistent across the three lanes. But hey, it's not like a bit of unfairness has ever stopped the speed Nazis.
The police's own figures prove that less than 5% of all accidents occur over the posted speed limit. Speed traps can do NOTHING about 95% of all accidents. No wonder road deaths have not changed one bit since the advent of cameras.
Grrrr.. I could properly get on my soapbox about this shit!