(02 May 2016, 11:05 pm)Ambassador wrote The info boards on Durham Rd were showing normal timetables. On Sundays and evenings they show the 21 and X21 as separate journeys.
Speaking of Google. They have the GNE X22 as Sapphire and the X12 as a sapphire too
I know its not Durham, but Google also have GNE X21 as a Sapphire at Bishop Auckland Bus Station