(20 Aug 2020, 8:57 am)DH9 wrote X21 doesn't seem (the last time I looked) to be having its very late evening services restored.

794 now going to be operated by Weardale.

They could perhaps be restored at a later date if the 21 was terminated at Chester Le Street during the evenings with timed connections between the 2x services for people needing to travel to and from stops that aren't served by the X21.