(09 May 2018, 11:50 am)mb134 wrote Ah okay, just assumed with the amount of services that end there late at night, and start there early in the morning it had some sort of vehicle/driver allocation. 

Most of those that appear to finish there late evening and start there early morning will likely be the same vehicle and driver - so the 0245 M11 arrival will more than likely run to the depot for refuelling and driver break before working the 0440 departure. The same way in that Walkergate is used by Megabus vehicles on the terminates but doesn't have an allocation of vehicles at this present time (there is, however, a Megabus driving unit at Walkergate who work the M12s and M20 hauls)

(09 May 2018, 11:50 am)mb134 wrote
Assuming it's currently seeing work on the X77 before the replacements arrive? Amazing how Stagecoach see express routes to how Arriva/GNE do...

Likely be a spare for the X77 for now - hard to see however where the displaced Astromegas will go. After all, not many other 'Express' routes in Scotland for them to be used on that don't already have quite modern coaches on already. Then there's the added complication of the present Oxford Tube Astromegas, which will be due for replacement next year.