The Vulcan Foundry was originally opened in 1830 at Newton-le-Willows, as Charles Tayleur and Company. It initially produced girders for bridges, switches and crossings, and other ironwork following the opening of the Liverpool and Manchester Railway. Robert Stephenson became a partner in 1832, and in the same year, the first locomotives ‘Tayleur’ and ‘Stephenson’ were delivered to the North Union Railway. By 1840 locomotives had been delivered to five European countries and to North America. The company became The Vulcan Foundry Company in 1847 and acquired limited liability in 1864. From the beginning of 1898, the name changed again to The Vulcan Foundry Limited, dropping the word 'company.' Vulcan locomotives were exported all over the world, with the first locomotives for Russia and Japan supplied in 1837 and 1871 respectively and a long association with India began in 1852. First World War production included shells, gun mountings and mine sweeping equipment. The first non-steam locomotive, an electric, was produced for India in 1929. The first diesel locomotive design commenced in 1932/33 and an agreement was reached with A/S Frichs in Denmark. The English Electric 6K engine was used from this time. The “Waltzing Matilda” tank was developed in 1938 and produced in large numbers and over five hundred ‘Austerity’ steam locomotives were produced for the War Department. Other wartime production included gun mountings and torpedo parts. In 1944 Vulcan acquired the locomotive business, Robert Stephenson & Hawthorns Ltd, based in Newcastle-upon-Tyne. In 1946 the company began working with the English Electric Company producing diesel and electric locomotives and became part of the English Electric Group in 1955. All locomotive building from Preston was transferred to Vulcan Foundry and Robert Stephenson’s in Darlington. Under the new ownership, the works produced many locomotives for both domestic and foreign railways, notably the Deltic. The mid-sixties saw the ‘RK’/’V’ engine production at Preston moved to Vulcan and Ruston & Hornsby Ltd merged with English Electric Diesels in 1966. After the General Electric Company plc (GEC) takeover in 1968 the Ruston name was used for some time inside what became GEC Diesels Ltd in 1975. Engine production and development continued for locomotive, industrial and marine applications until after the GEC-Alsthom merger in 1989. The company took over Mirlees Engines, Stockport in 1997 and was renamed Alstom Engines Ltd.

The North British Locomotive Co Ltd was formed by the merger the 'big three' Glasgow locomotive builders (Sharp Stewart & Co, Neilson, Reid & Co and Dubs & Co) in 1903 as a result of increased competition both at home and from abroad. The new company claimed to be the largest manufacturers of locomotives anywhere outside America and was prompted by the ever increasing annual production by the Baldwin Locomotive Company in Philadelphia, USA, which had recently made incursions into the domestic UK market and in India, which the British locomotive industry had considered to be its own special preserve. It was believed that the rivalries and competition between the three companies operating individually within Glasgow had already produced significant technological advances which, in the new North British Locomotive Company would combine to make a single powerful and well equipped company, ready to dominate the market and take on competition, particularly from America. The new company never managed to operate at its capacity of 700 locomotives per year, producing a maximum of 573 in 1905. These numbers were maintained through to 1909 when production numbers began to fall rapidly. During the First World War North British Locomotive Company made locomotives for the War Department, as well as munitions and other military equipment, which were produced in vast quantities to meet the high demand. However, between the two World Wars, while orders were still being received, particularly from domestic railway companies, the fluctuation of demand meant that the company ran into some difficulty. As a result, employee numbers were significantly reduced, and manufacturing was concentrated at Queens Park and Hyde Park works. The last locomotive orders were completed at the Atlas Works in 1923. The Great Depression from 1929 saw the decline in demand for locomotives worldwide, with none built at all in 1932, and by the end of the 1930s, locomotive production at the North British Locomotive Company was operating at a loss. At the outbreak of the Second World War the company concentrated once more on war work, supplying both locomotives for the Ministry of Supply and munitions for the war effort. After World War II there was something of a revival in locomotive manufacturing, with orders being received and agreements being reached to build diesel & electric locomotives with the General Electric Company. This upturn in fortune was not to last however, as the North British Locomotive Company failed to make the successful transition from steam to diesel locomotive production. In 1957, the last order for steam locomotives was placed with the company and the last steam locomotive was completed in 1958. Although the company were making small industrial diesel locomotives, and received some early main line diesel orders from British Railways, the orders were never big enough to maintain the company. Other locomotive manufacturers, who had acted swiftly in transferring from steam to diesel and electric production, were becoming more successful. The company went into liquidation on 19 April 1962 with Messers Andrew Barclay Sons & Co (Kilmarnock, Ayrshire, Scotland) acquiring the North British Locomotive Company's goodwill.

In 1854, Charles Frederick Beyer and Richard Peacock founded Beyer, Peacock & Co, a mechanical engineering company. Their works were at Gorton, east of Manchester. A legal partnership was formed between Charles Frederick Beyer, Richard Peacock, and Henry Robertson, a sleeping partner which took effect from 1 January 1855. In the early days of the company it was the partners who managed the affairs of the company. Beyer acted as Chief Engineer with control over the Drawing Office and Works, Peacock as Commercial Manager handled the commercial side of the business, and Robertson acted as Financial Advisor. Under the Chief Engineer were the Chief Draughtsman and the Works Manager. An accountant was also employed. In July 1855 the first locomotive engine left Gorton. It was made for the Great Western Railway Company and was used on the Paddington to Oxford route. Between 1854 and 1868 Beyer, Peacock built 844 locomotives, of which 476 were exported. The company sold mainly to the colonies, South Africa and South America, but never broke into the North American market. In 1883 the company was incorporated as a private limited company and renamed Beyer, Peacock & Co Ltd, with registered offices at 34 Victoria Street, Westminster. In 1902 the company became a public limited company, Beyer, Peacock & Co (1902) Ltd. (The (1902) was dropped the following year). In 1908 the registered offices were moved to Gorton and the new London office was at 14 Victoria Street, Westminster. In 1919 the London offices were given up and then in 1923 new premises were acquired at Abbey House, London. During WWII the registed offices were moved to Flore Manor in Northamptonshire. In 1956 the London offices of the company were moved from Abbey House to Locomotive House, Buckingham Gate. One of Beyer, Peacock's most successful locomotives was an articulated locomotive called the Garratt. Its designer, H. W. Garratt, had a wide knowledge of locomotive design and construction from his work in various countries including Argentina and Cuba. In 1908 Garratt was granted a patent. Beyer, Peacock had sole rights of manufacture in Britain. In 1928 the patents ran out and the company began to use the name Beyer-Garratt to distinguish their locomotives. During WWI Beyer, Peacock began to manufactire artilliery and in August 1915 Gorton Works was put under Government control with production switching almost entirely to the war effort, especially heavy field artilliery. During WWII the company was again brought under government control but continued to build locomotives throughout the war. Beyer, Peacock was faced with competition from tramways and electric railways. They began to look for alternatives so that they were not dependent on one product. In 1932 they acquired Richard Garratt Engineering Works Ltd who made steam traction engines, steam road lorries, and agricultural equipment. In 1949 Metropolitan-Vickers, Beyer, Peacock Ltd was formed which was jointly owned by Metropolitan Vickers and Beyer, Peacock. The company was created to build locomotives other than steam. By 1953 Beyer, Peacock had acquired the following subsidiary companies: Denings of Chard, makers of agricultural machinery; Theramic Ltd, makers of theramic siphons for locomotives; Maiuri Refrigeration Patents, Low Temperature Developments Ltd, and some other companies concerned with sales, such as Rail Traction Supplied Ltd. In 1957 Beyer, Peacock acquired Anti-attrition Metal Co and in 1958 Air Control Installations Ltd. In this year Beyer, Peacock (Hymek) Ltd was formed. The late 1950s saw a rapid transformation in locomotive manufacture. In 1955 British Rail decided to switch from steam to diesel and overseas users followed suit. Beyer, Peacock all but closed down the Gorton plant at the end of 1958. They had chosen to make diesel-hydraulics but British Rail opted to use diesel-electrics. In 1960 Beyer, Peacock’s subsidiary companies became members of the Beyer, Peacock Group and Beyer, Peacock Co. Ltd became the holding company. In 1966 all production ceased at the Gorton foundry. Shares in Beyer, Peacock were eventually bought by National Chemical Industries Ltd and in 1980 Beyer, Peacock and Co. Ltd became a dormant company. The name was resurrected in the 1990s as a trading name, based in Devon.

George Stephenson with his son Robert, and partners Edward Pease and Michael Longridge established the first locomotive works in the world, the Forth Banks Works, in 1823. The original factory occupied eight acres adjacent to Forth Street, Newcastle-on-Tyne, much of its machinery being designed and built by George Stephenson. Between 1814 and 1825, George and Robert Stephenson were the only builders of locomotives in the country, the first - Locomotion No 1 – was for the Stockton and Darlington Railway, though it was Rocket’s triumph at the Rainhilll Trials in 1829 which established the works pre-eminence. Between 1824 and 1827, the Forth Street works were not limited to the manufacture of locomotives and there is evidence of wagons, wheels, and engines of all kinds being ordered. Locomotives were also exported to France and America following a visit to the works by engineers from both countries in 1828 and early 1829. The first passenger locomotive – INVICTA (0-2-2) was built in 1830 for the Canterbury and Whitstable Railway. The Planet class (2-2-0s) with inside cylinders under the smokebox and outside frames was adopted as standard on the Liverpool & Manchester Railway, further developed in 1833 with a pair of trailing wheels fitted behind the firebox making it a 2-2-2 (the Patentee). The Patentee class was generally accepted as “the best of its day” (Warren, 1923). Orders for these two types were so numerous that many had to be passed on to other locomotive builders such as Tayleur & Co (later Vulcan Foundry). With the opening of the Liverpool & Manchester Railway, Charles Tayleur entered into a partnership with Robert Stephenson in 1832, although there is some indication that this lasted no more than a year or two. Associated with this partnership may be the discontinuation of the old series of works’ numbers in 1831 (up to c 40) and the commencement of a fresh series is evidenced in the order books (i.e. Samson old 34, new 14; Jupiter old 35, new 15; Goliath old 36, new 16). Another important development in this period was the appearance of the ‘long boiler’ type that resulted not only in a greater heating surface but a better ratio of tube length to tube diameter without increasing the wheelbase. In 1839 two 2-2-2s were supplied for Brunel’s 7ft gauge of the Great Western Railway. In 1846 when the works had 224 engines on order, railway mania was at its height. By 1855 over 1000 locomotives had been built, the firm’s order books graphically reflecting both national and worldwide interest in their acquisition. A visitor to Newcastle in 1838 records “the marvellous manufactory of Mr Stephenson alone occupies four hundred workmen for the supply of steam engines to all parts of the world” (Lowe 1975). It is right to say that “where there were railways, very few had no locomotives from this builder” (Lowe 1975). George Robert, Robert Stephenson’s cousin, who had taken on responsibility for the firm’s orders on the latter’s death in October 1859, energetically pursued overseas’ companies through frequent absences abroad, adding the Australian continent, the Far East, Africa and South America to those countries already supplied. A private company was formed in 1886, voluntarily wound up in 1899, and a new public limited company formed as Robert Stephenson & Co Ltd. The Forth Street works could expand no more and new works were built at Darlington on 54 acres of land. Although modern in their equipment, the works were laid out for small batch orders with locomotives being carefully built and quality coming before quantity. One of the important decisions of the new company was to remove locomotive building to Darlington, leading to the separation of the marine and boiler works. In 1902, the first of a long series of 2-8-0 heavy goods locomotives were built for India, soon followed by an exceptionally large 2-10-0 locomotive for Argentina. This began a remarkable series of engines, which became the prototype for large and successful classes of heavier locomotives. At the beginning of the First World War some manufacture of munitions was undertaken but it soon became apparent, as military operations progressed, that locomotives for transportation were increasingly demanded. The firm fell victim in the early 1920s to many industrial disputes amongst suppliers leading to the cancellation of orders. On 1 January 1937, Robert Stephenson & Co Ltd combined with R & W Hawthorn Leslie & Co Ltd, becoming Robert Stephenson & Hawthorns Ltd. The policy was to concentrate on the building of main line locomotives at Darlington and industrial locomotives at the Forth Banks works of the former Hawthorn Leslie Company. Standard 0-4-0ST and 0-6-0ST continued to be built in large numbers from 1938 for collieries, steel works, chemical plants and many other industries: war time requirements were such that the works were fully extended and very few orders were obtained from abroad. In 1944 the Vulcan Foundry acquired a substantial holding in the company and later the two firms became members of the English Electric Co Ltd with works at Newton-le-Willows, Darlington, Newcastle, Bradford and Preston forming the main units of the railway traction division. The Forth Banks works, established in 1823, were closed in 1960 and all diesel and electrical locomotive building concentrated at Darlington. The joint company built approximately 1000 steam locomotives. As from 1 January 1962 the works became the English Electric Co Ltd, Stephenson Works, Darlington: retention of the work’s name perpetuating the long association of locomotive building with George and Robert Stephenson. However, the last diesel locomotive left the Darlington Works in 1964.

James Nasmyth (1808-1890) founded the original company in 1836 at the Bridgewater Foundry. They originally made special purpose machine tools, steam engines and other engineering products. In particular they produced Nasmyth’s own invention of the steam hammer, which revolutionised practice in heavy engineering. The company was known as Nasmyth Gaskell & Company from 1838 to 1850, following investment by Holbrook Gaskell. From 1850 it was known as James Nasmyth & Company until Nasmyth retired in 1856. In 1857 the company became the Patricroft Iron Works. In 1867 Robert Wilson joined the works and the company changed its name again, first to Nasmyth Wilson & Company and finally in 1882 to Nasmyth Wilson & Co Ltd. Until the 1880s locomotive building was neither a major nor a consistent part of the company’s production, but increased from that decade. Most of the production was for railway companies abroad. Orders became difficult to obtain after the First World War and in 1939 the company was wound up. The works were taken over by the Ministry of Supply in that year as the Patricroft Royal Ordnance Factory. They built some 1531 locomotives between 1839 and 1939.