(08 Oct 2016, 8:32 am)GX03 SVC wrote Or the X21 route throughout? 

Would mean a PVR of 3x vehicles being required if from Newbiggin. Got to bear in mind that even though some sort of a service is fantastic and serving the X21 route throughout would be great, it needs to keep to time too and Ashington to Newcastle via the Elephant, Stakeford, Bedlington Station, Bedlington and the Hartlands would allow a 52 minute journey (using Monday to Saturday timings) either way to run with 10 minutes recovery at Haymarket + 6 minutes at Ashington. The passenger numbers would probably be decent too so some late running would happen meaning good recovery time at either end (particularly Newcastle) would make up for the late running.