The Severn Tunnel, one of the key links in the Great Western main line through to Cardiff and Swansea, will close for six weeks to permit work on the route’s electrification.
Whilst some preliminary work has been completed — such as the removal of four tons of soot and the drilling of 7,000 holes for the catenary — a six week closure will be required to finish the job.
The closure will take place between 12 September and 21 October, with some services diverted to operate via Gloucester and others run with buses.
The work is part of a £2.8 billion programme of work to electrify the Great Western main line from London to Bristol, Cardiff and Swansea and it was estimated that the work would have taken up to four years without the six-week closure with only weekend possession of the route.
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