(26 Jun 2022, 9:53 pm)F114TML wrote If so, given the X21 is all stops south of Chester, the X1 is all stops south of Shiney Row, the X20 is only limited stop between Rainton and Belmont, and the X15, X15, X30, X31, X45, X46 X70, X71 and X72 are all stops for almost the entire journey (weren't the X5, X15, X45 and X46 just existing normal services renumbered to put an X in front?), then it's doing a TERRIBLE job of it.

I thought it was simply to bring all the express ("express") routes under a single, unified brand.

Yeah I think they were. 

X30/X31 are only it cos it faster than the 6. 

I don't know why X70/X71 especially the X72, which takes an extra 20 mins than X30/31