In lane 1, averaging 20 mph, with big gaps between vehicles, were the cars.
Nose to tail, in the overtaking lane, at approx 50mph, were the 38 tonne and 44 tonne trucks and the ubiquitous WVM.
All it would have taken was a single application of the brakes on one of those behemoths and the result would have been carnage.
Have articulated trucks suddenly developed a system whereby they are immune to the weather?