 The line from Ladybank to Perth forms part of the Edinburgh to Inverness Line.For now, though, the train service is replaced permanently by a bus, and to operate stopping services on the line may require loops in certain places (possibly even redoubling, as the line is already heavily used by / Perth - services).Occasionally, freight, London-bound trains and the Caledonian Sleeper services use this line if the route via Stirling is closed for maintenance.