It seems Highland Airways will be reducing capacity on the Oban-Coll/Colonsay service in the winter timetable. The latest AIP update, valid from 23 October, changes the Coll and Colonsay opening hours so that both are open only on Tuesdays and Thursdays, with Colonsay open earlier and later than Coll. This suggests that they plan to do Oban-Colonsay(-Tiree?)-Coll-Oban in the morning, then Oban-Coll(-Tiree?)-Colonsay-Oban in the afternoon. If that's the case then they clearly think they're never going to have more than 8 pax for all three islands in total, including any inter-island pax.
Also interesting that Colonsay's promulgated as not opening till 1600 in winter, but Oban will close at "1630 or sunset whichever is earlier". So assuming the Islander arrives at Colonsay from Coll at 1605, departs at 1620, it gets to Oban at 1645 - airport closed, unless special arrangements have been made. But given that the sole purpose of licensing any of these airfields was for the scheduled service, why promulgate opening hours which can't accommodate that schedule and require special arrangements to be made?
Also strange that they plan to close at sunset rather than official night. Even stranger that they seem to be planning a winter schedule which will be impossible to fly for much of the winter because of daylight considerations.
NS