Ah the 638, hasn't been mentioned for a while.
As others have said, it was always busy, particularly on the Galleries - Sunderland section.
The fact that section still exists, is enough to tell me the demand is still there.
I remember the section between the Galleries and Low Fell wasn't that well used, however it still provided vital links for short hops. Unfortunately this section was never replaced - with passengers relying on what had been left after the cull in Washington and a number of services beyond Blackfell.
Beyond Low Fell, obviously the 69 still exists - but I can't comment on the 638 loadings.
Edit. I can vaguely remember that duplicate service. One was just a short run if I remember correctly though.
RE: Go North East Service Suggestions