From the late 1870s a number of the single line sections were made double track, to improve handling of the heavy train service, and by 1905 about two-thirds of the main line mileage was double track, and trains could now run throughout from Bath to Bournemouth with reasonable convenience, excepting only the awkward arrangement at Templecombe. Southbound trains calling there (to make connection into the LSWR Exeter main line) had to be hauled back to the S&D junction by a spare engine, then to continue their southward journey; the corresponding evolution in reverse was necessary for northbound trains. This complexity persisted until the final closure of the S&D line.