The LSWR doubled the line between Thames Valley Junction the Kingston branch and Fulwell, probably in 1867. The doubling was extended from Fulwell to Sunbury on 17 July 1878, and to Shepperton on 9 December 1878.
The LSWR expanded its railway network by doubling the line between Thames Valley Junction and Kingston branch at Fulwell around 1867. This expansion was later extended to include connections to Sunbury on 17 July 1878, and then to Shepperton on 9 December 1878.