The bloke mentioned in the article is quoted as being recorded at 42mph? "One of those caught out was lorry driver of almost 20 years Gary Richards, who drove through the 20mph limit and past speed cameras at 42mph at 2.30am, 12 hours after the crash happened." Incidents like this where common sense is thrown out the window are the sorts of things that just generate resentment and lack of respect for the highways agencies. The fines should go to the idiot who didn't adjust the speed signs at the correct time. 50mph can be daft enough at 2:30 in the morning when its mostly supermarket and parcel delivery lorries on the motorway, as for 20mph!
Doc H.