Routes that have been Withdrawn for more than 10 years
(Today, 12:09 am)Jimmi wrote Yes, originally X1 Middlesbrough - Durham - Newcastle but when split registrations became a thing, the Durham to Newcastle stretch was renumbered as X2, the Middlesbrough to Durham stretch would be renumbered to X12 in January 2015 as it was considered "confusing" having two X1 services in close(ish) proximity, the other being X1 Darlington to Crook which was introduced in 2013 when GNE started the OK1 which was quicker than Arriva's 1 service, once Arriva seemed to clock that each section of split route didn't need to have a different route number, they renumbered the whole service to X12. Dalesbus was especially silly when Arriva gave each split a different number, think they ended up with 4-5 different route numbers at one stage.
Crossing out of region but some other long routes:
Dalesbus 831: Middlesbrough to Hawes (continues to Kirkby Lonsdale as 832)
Moorsbus M3 Darlington to Pickering
6 Durham to Barnard Castle with the recent introduction of the summer 873 service taking things a step further by doing a similar route to the 6 but continuing all the way up to High Force. In a similar vain, one from the past being when the Darlington 5/5A replaced the 6 for a little while creating one through bus from Darlington to Durham via Bishop Auckland which ended up taking just shy of 2 hours from end to end.
I do agree on the 873