Knowing First Glasgow, I have a feeling that in the future, we may sometimes see the Scotrail buses make occasional services on other routes.
Back years ago, when First had the 398 route contract, they ran the service with branded Optare Solos, with two buses being given an SPT Rail wrap at first (53202 & 53203) but these got re-painted into the standard livery at the time. Later on, they gave two a Scotrail Saltire wrap (50463 & 50465), and they would also later be re-painted into the standard livery at the time too.
Anyways, they would sometimes make appearances on other routes such as the M3 (or the 3 before 2013), the M60 (or the 140 before 2013), the 81, and some of the 2xx Lanarkshire services, while a regular liveried solo would run in it’s place.
(New Post: Tue 24 Oct)
So currently, here are the buses that are on-loan to Aberdeen right now from First Glasgow: