Get a lot of explosives in a Zed!!! Talked to a relation op mine who is involved in the camera side of this, he ha heard nothing about a nationwide drive so I think its just another easy excuse to prosecute under the "nanny state" rules.
If they wanted to it would be simple to speed limit all cars so they couldnt speed on motorways. Big earner though!
I used to work in Aberdeen and the drive up there was a nightmare, shorter than my present commute to London but speed was an issue.
Having said that, many years agi I had an Allegre 1750 and the speeding ticket sold the car.!!!