The numbers of the main routes from Leeds up Chapeltown Road haven't changed for decades. I recall routes 2 (Leeds City Transport to Moortown, formerly tram route 2) and 36 (WYRCC to Harrogate and Ripon, with some joint working with UAS) from the early 1960s.
--- old post above --- --- new post below ---
And Manchester:
Another historical route is the 22, dating back to the 1930s, which was originally jointly operated with the North Western Road Car Company and Manchester Corporation and ran between Levenshulme and Eccles via Chorlton-cum-Hardy. The route has subsequently been extended northward to Bolton from Eccles, and diverted at the eastern end to terminate at Stockport rather than Levenshulme (Lloyd Road). It is still jointly operated, by First Bus and Stagecoach, with some subsidised late evening journeys by M/c Community Transport.