(30 Aug 2015, 5:57 pm)coldav wrote Not odd on a Sunday. X15 and X18 interwork.
(31 Aug 2015, 8:06 am)GX03 SVC wrote Do they? I asked the supervisor a while ago if the X15/X18 interwork and he said that they didn't.
I don't have any evidence to back it up, but I'm fairly confident they don't interwork. From looking at the timetable I can't see a reason for them to need to interwork, and I don't see the point of buses swapping routes in Alnwick Bus Station when the X15 and X18 both arrive together.
The X18 does have a Sunday PVR of 6 so another MAX spec bus will be needed to make up the numbers.