Mobile motorway speed enforcement

[j4ck100]

So I was under the impression that speed enforcement on motorways was done via fixed cameras & marked / unmarked police vehicles mixing in the traffic, but my friend told me that a couple of days ago on the M4 westbound approaching Swindon there was a TVP V70 on one of those police layby's to the side of the motorway with a chappy aiming a speed gn out of the window!

Do you see this at all?

[j4ck100]

How funny, had to drop my car off at a specialist up near Bicester, and low on behold there was a van parked over the northbound M40 with the hatch open facing the outside lane!

Right here if anyone is interested

https://www.google.co.uk/maps/@51.7245363,-1.05765...