From 2009 the railway adopted a letter-coded timetable system with “R” being the standard four trains in each direction each day as previously, with a variety of other codes ranging from “S” with a six train service to “T” covering the commuter trains in T.T. week and “U” for evening services commonly operated on a Thursday in peak season.  The monthly Commuter Club trains were designated as timetable “C” supplementing the days’ services and an experimental “V” schedule operated some years with “W” being a shuttle service between Castletown and Port Erin when the Billown Circuit is closed and buses cannot easily serve the south of the island.  Finally, timetable “X” appeared from time to time, for which a separately published timetable was issued usually in connection with Rush Hour when an intense service was provided.