| Border Union Railway | |
| Locale: | Dumfriesshire & Roxburghshire, Scotland; Cumberland, England |
| Open: | 21 July 1859 |
| Close: | 31 December 1922 |
| Event1label: | Successor line |
| Event1: | London and North Eastern Railway |
| Short Title: | Border Union (North British) Railways Act 1859 |
| Type: | Act |
| Parliament: | Parliament of the United Kingdom |
| Long Title: | An Act to authorize the North British Railway Company to make a Railway from their Hawick Line to the Port Carlisle Railway near Carlisle, with divers Branches therefrom, and for other Purposes. |
| Year: | 1859 |
| Citation: | 22 & 23 Vict. c. xxiv |
| Collapsed: | yes |
The Border Union Railway was a railway line which connected places in the south of Scotland and Cumberland in England. It was authorised on 21 July 1859 by the (22 & 23 Vict. c. xxiv) and advertised as the Waverley Route by the promoters - the North British Railway.[1] It connected the Edinburgh and Hawick Railway at with .
The first section of the route was opened between Carlisle and Scotch Dyke on 12 October 1861, to Newcastleton on 1 March 1862, Riccarton Junction on 2 June 1862 and throughout on 24 June 1862.[1] The railway was built as a double-track main line throughout.
The line was closed to all traffic by British Railways on 5 January 1969. The line was dismantled in 1971.[1]
The Waverley Route Heritage Association have preserved a part of the former route at Whitrope and are working on reopening the section from its base at Whitrope itself down into Riccarton Junction as a heritage railway.[2]