Feltham marshalling yard, also known as Feltham hump yard, was a large railway marshalling yard designed for the concentration of freight traffic to and from South West London, and for transfer to other marshalling yards in London. It was built on the Waterloo to Reading Line. It opened in 1918 and was closed by British Railways on 6 January 1969. Part of the site is now being rebuilt to stable Class 701 electric multiple unit trains for South Western Railway (SWR).