Just a quick one. Am I right in saying that daytime tickets (e.g. an Anytime Day Return) can be used on the Caledonian sleeper on the West Highland Line? It seems to imply this on the Sleeper website, but was wondering as I am holidaying in Tyndrum next week and was wanting to travel northwards in the mornings to Rannoch, Corrour and maybe Fort William (and possibly aslo return in the evening)? If so, I presume these tickets can be bought on the train, as there is no ticketing facility at Tyndrum Upper?