Wilts, Somerset and Weymouth Railway
Starting from the junction at Thingley, a couple of miles southwest of Chippenham, the line was constructed via Melksham and Trowbridge as far as Westbury.
1848 It was inspected by the Board of Trade inspector on 26 August 1848 and approved for opening. After a trial trip for the directors on 2 September, this section was opened to the public on 5 September 1848
1850 Line sold to the GWR who took over the construction and undertook to build an adjacent connecting line; the network was complete in 1857.