CalMac have now published their winter timetable for all routes, from 20 October to 26 March.
Booking opened at 0900 BST on 11 September.
EDIT- Note that the timetable for services from Lochranza is not correct. It has subsequently been announced that Portavadie to Tarbet and Lochranza to Claonaig will each have a vessel, rather than sharing one, as has happened for many years. This is to improve resilience in essential services to Arran in case of weather disruptions at Troon.