Re: Pedant Alert
"The sections of the A1 called "A1(M)" are of sufficiently motorway-like character that the law treats them as motorways (e.g. no stopping, no bicycles, no L plates except HGVs, etc.)"
And uses the term "Non-Motorway Traffic" on signs directing such vehicles away from it.
I think we can safely say that they are indeed motorways.