(23 Aug 2015, 5:45 pm)DaveyBowyer wrote I gave the express from Newbiggin to Newcastle an express number to keep it close to the X20. The X89 would make perfect sense from Blyth and Newsham as the Spine Road is called the A189 and the key benefit of the current X30 over the other the X10 / X11 is that it serves the Spine Road rather than Crammy.
It would make perfect sense to number a service after the last two digits of the road it takes? In that case let's renumber the 21 as the 67.