X26/X27 have a new timetable from end of October too. Will try and get some details on them all and post itThis is what I think will happen with the X26/X27/26A based on info from Traveline:
No change during Monday to Saturday daytimes.
On evenings it looks like it will operate as a standalone service and because of the odd journey time of just over an hour the 26A will leave Darlington at 1815, 1915, 2030 and 2130.
Sunday daytime 26A will leave Darlington at 15 mins past hour which is 15 minutes later than present. I may be wrong but looking at the times for the 26A and X66 on Sundays I think they will interwork and I think the 5A will interwork with the 19.