| Caledonian Railway (Lesmahagow Branches) Act 1854 | 
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| Long title | An Act for altering the Lines authorized by the Caledonian Railway (Lesmahagow Branches) Act, 1851, and for otherwise amending that Act. | 
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| Citation | 17 & 18 Vict. c. clvi | 
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| Royal assent | 10 July 1854 | 
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| Amends | - Caledonian Railway (Lesmahagow Branches) Act 1851
 
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| Caledonian Railway (Lesmahagow Branches) Act 1860 | 
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| Long title | An Act for more completely merging in the Undertaking of the Caledonian Railway Company certain Railways known as the Lesmahagow Branches; for incorporating the Holders of the Lesmahagow Branches Stock, and securing to them a fixed Annuity; and for other Purposes. | 
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| Citation | 23 & 24 Vict. c. xcvii | 
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| Royal assent | 14 June 1860 | 
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The Lesmahagow Railway, south of Glasgow in Scotland, was developed by a company known as The Lesmahagow Branches (later known as The Lesmahagow Guarantee Company). It was not an independent company in the usual sense. It was a financially independent, self-contained unit within the framework of the Caledonian Railway (CR). The shareholders and officers of both companies were mainly the same people. The line was  built largely to transport the vast amount of coal being produced by the many mines in the area. Authority to build the line was given in the Caledonian Railway (Lesmahagow Branches) Act 1847 (10 & 11 Vict. c. xxiv) but construction did not commence till 1854. In 1856 the line was opened in stages. Later there was found to be a demand for passenger services which commenced in 1868. In 1923, with the grouping, the CR amalgamated with several other companies to form the London, Midland and Scottish Railway (LMS) which, following nationalisation in 1947, became part of British Railways.