Just looking at the X14 timetable, I have a feeling Arriva have already won something in Morpeth as the timetable just doesn't work.

The 10:55 service into Morpeth doesn't have a return journey until 12:43 and the 12:55 service into Morpeth doesn't have a return journey until 14:43 and the 14:55 journey doesn't have a return journey until 16:48

Plenty time to run something inbetween ie. the S1 which conveniently runs very close to those times and the very early run towards Chantry could run empty to Longframlington and run that board down.