The Yorkshire Pullman, the Tees-Tyne Pullman and the Newcastle Pullman lasted into GNER days before being put to bed in 2002, I think. Unfortunately, the titles had long since been relegated to a footnote in the timetable and a piece of card in the window. Really, BR had only used them to designate their full dining service, which GNER expanded on, so they weren't really special any more. However, they missed a trick by not naming their fastest Newcastle diagram the Golden Jubilee, as did EC with the Diamond Jubilee.
I've heard North Briton attached to the Leeds-Aberdeen diagram a few times, although that's never been official. According to Peter Semmens, at one time it would have been operated by the prototype HST, but that never happened.