The Alderton Tunnel sits on the South Wales Main Line in England, on a stretch of line between Swindon and Bristol Parkway. The tunnel, which is 506 yards long, was opened on 1 January 1903 along with the line between Wootton Bassett and Badminton, that being the first section of the South Wales & Bristol Direct Line of the Great Western Railway.
- MacDermot, E.T. (1931). History of the Great Western Railway, vol. II: 1863–1921. Paddington: Great Western Railway. p. 425. OCLC 55853736.
- "1901 Census: Alderton" (PDF). Wiltshire OPC. Retrieved 16 September 2017.
- "Great Western Rail upgrades affecting south Wales begin". BBC News Online. 19 August 2017. Retrieved 16 September 2017.
- "August work set to bring new trains to Wales and the West". Network Rail. Retrieved 19 August 2017.
Swindon to Bristol Parkway – Piling will take place to install overhead line equipment (OLE) for electrification, alongside OLE installation through Chipping Sodbury and Alderton tunnels.
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