I regard the material put out by Go North East themselves as definitive, whereas other sources may be subject to errors. In particular, the Bustimes lists have a reputation for getting amended at the whim of someone who may or may not actually know what is really happening - I don't know whether the GNE page suffers from this, but the reputation is sufficient for me to take any of their "data" with a pinch of salt, and a big dose of skepticism if it seems a little .... unexpected!