Barra is showing no demand at all, whilst I'm not looking for realism, it is prudent to expect Barra should have some demand. Just what demand is actually programmed for Barra? I couldn't find any at all. It says Domestic 100%, but it doesn't define what that demand is. I tried every airport up to 300 nm, and could not find any demand for any destination. Barra has had a consistent daily service to Glasgow from before the earliest date of all the sims here, and still runs to this day, which suggests there should be some demand from Barra to Glasgow.
The same goes for Tiree, what demand comes from there? Again, flights go to Glasgow as well as Oban (EGEO/OBN) and Coll (EGEL/COL), whilst those last two airports are not in this sim so it's understandable they don't show demand, there should at least be demand from Tiree to Glasgow.
It sort of begs the question, if there's no demand from them at all, why are they there?