main line railways in Great Britain, under the Railways Act 1921; the G&SWR, together with the Caledonian Railway, became constituents of the London, Midland & Scottish Railway (LMS). In turn the LMS, together with other railways, was nationalised and the Scottish sections became British Railways, Scottish Region. The G&SWR lines retained a distinct informal identity through these changes, and the alliance with the old Midland Railway seemed to survive as well: a day train between Glasgow and St Pancras followed the G&SWR route and the Midland route; it was named the Thames-Clyde Express for most of its existence, ceasing to run in 1976. A night train with sleeping cars ran from Glasgow over the original route via Paisley and Dalry (to give Paisley a direct service) until the 1970s. Now a secondary route, the line carries local passenger services operated by ScotRail; a moderate volume of freight also operates over the route. Accident On Sunday 14 August 1966, the previous evening's 22:10 Glasgow Central – London Euston consisting of five seating coaches, eight sleeping cars and two parcels vans hauled by EE Type 4 locomotive No. D311 crashed into a landslide between Sanquhar and Carrondale at 00:30. The loco and first ten coaches were derailed. None of the 270 passengers and four train crew were injured. Topography The line opened from Dumfries (temporary station) to Gretna (Junction with the Caledonian Railway) on 23 August 1848. It was extended from Dumfries to Closeburn on 15 October 1849, and completed to Horsecleugh on 20 May 1850. On 20 May 1850 the GD&CR ceased to exist, forming then part of the Glasgow and South Western Railway. Stations on the line are shown below; events that took place after opening day are shown in italic. The line originated at Horsecleugh, an end-on junction with the Glasgow, Paisley, Kilmarnock and Ayr Railway; Horsecleugh was not a station; ; closed on 6 December 1965; reopened 22 May 1991; ; closed on 6 December 1965; reopened 27 June 1994; Carron Bridge; renamed 1 January 1871; closed on 7 December 1953; Thornhill; closed 6 December 1965 ; ; closed 11 September 1961; ; closed 3 November 1952; Killylung; renamed Holywood on 28 October 1850; closed 26 September 1949; ; closed 6 December 1965; Dumfries; temporary station at first, relocated northwards in March 1859; ; closed 6 December 1965; ; closed 19 September 1955; Annan; Dornock; closed October 1854;