«August work set to bring new trains to Wales and the West». Network Rail. Archivado desde el original el 19 de agosto de 2017. Consultado el 19 de agosto de 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. This August there will also be flood resilience upgrades at Chipping Sodbury».
pastscape.org.uk
«Sodbury Tunnel». Pastscape. Historic England. Consultado el 28 de marzo de 2020.
«August work set to bring new trains to Wales and the West». Network Rail. Archivado desde el original el 19 de agosto de 2017. Consultado el 19 de agosto de 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. This August there will also be flood resilience upgrades at Chipping Sodbury».