(27 Jan 2022, 11:02 pm)stagecoachbusdepot wrote Seems you are thinking of route numbers in Newcastle from way further back than those I was referring to.

The 15 operated from July 1988 (for a long time as 14/15 circulars) under Newcastle Busways, TWOC, Newcastle Busways again, Stagecoach Busways and well into Stagecoach stripes (existing until maybe 5 years ago) though by the end just as the 15.

The 19 I am referring to was introduced in July 1988 as part of the 18/19/20 grouping (now just the 18 remains, and only in part) and existed for decades through the Busways years and well into Stagecoach (19 went in 2006).

In terms of the Sunderland routes, again I was referring to post-dereg numbers from late 80s onwards.  Prior to that believe routes in Sunderland hadn't carried 1 or 2 digit numbers since 1973...