The English Electric Company was formed on 14th December 1918 and over the following year acquired Dick, Kerr & Company of Preston, Willans & Robinson of Rugby, the Phoenix Dynamo Manufacturing Company of Bradford, and Coventry Ordnance Works. After the First World War the various German owned Siemens works were distributed to different UK companies and in November 1919 English Electric acquired the Siemens Brothers Dynamo Works at Stafford, which became the company headquarters in 1931. Coventry Ordnance, primary output naval guns, did not feature in the gradual product rationalisation which took place between the First World and Second world Wars. Willans & Robinson’s Rugby works specialised in prime movers, steam, hydro and internal combustion, and their Stafford works on power station and distribution electrics, including transformers and large electric machines for applications such as mining and steel works. Dick Kerr & Company continued building equipment and vehicles for bus, tram and railway applications with the Phoenix Dynamo Manufacturing Company concentrating on medium and small electrical machines. Involvement with aircraft continued a small scale. By 1929 the company was in financial trouble and an American syndicate fronted by Lazard Bros. put in new capital. In 1930 Westinghouse of Pittsburgh entered into an agreement with the company for the exchange of technical information relating to steam turbines and electrical apparatus. This cooperation continued into the 1950s. 1930 saw the closure of Preston West works and the transfer of traction electrical design and manufacture to the Phoenix Dynamo Manufacturing works. The Westinghouse influence included top management changes with Sir H Mensforth becoming chairman and George Nelson managing director. Both had been with British Westinghouse at Trafford Park. The early 1930s saw a remarkable improvement in the company’s finances and domestic appliance manufacture was started at Bradford and Stafford. In 1936 they began production of diesel locomotives at Preston and were later involved in the production of the Deltic locomotive for British Rail, presaging the end of steam traction in the UK. Extensive shadow factory building for war production commenced in the late 1930’s, including at Preston East works and Salmesbury for aircraft production and at East Lancashire Road, Liverpool for D. Napier aero engines. A large variety of military equipment built during the war included thousands of Cromwell tanks from Stafford and over 3000 Handley Page Hampden and Halifax bombers from Preston and Salmesbury. After the war manufacture of smaller products from Bradford and Stafford moved to the large Liverpool works. This included electrical distribution transformers, switchgear, fuse gear, fractional horsepower motors and domestic appliances. Napier’s continued engine manufacture with the development of the ’Deltic’ diesel engine, mainly for marine applications. The nearby Netherton works took over the manufacture of large hydro-electric turbines and generators from Willans and Stafford. In 1942 English Electric acquired D. Napier & Son Ltd and Marconi in 1946. The company went on to extend their railway interests with the acquisition of the Vulcan Foundry and Robert Stephenson and Hawthorn Ltd in 1955. The company tried to take over The General Electric Company (GEC) in 1960 but failed. Traction manufacture, but not the offices, moved back to Preston East works and ‘K’, ‘RK’ and ‘V’ engine design and manufacture moved from Willans to Preston West works which was now also used for locomotive building. Kidsgrove works in Stafford made industrial controls and for a while was a major player in the UK computer industry, merging with Leo Computers and then into ICL. Train performance calculations were an early user of the mid-fifties ‘Deuce’ computer. Preston also became a major player in the aircraft industry taking over the wartime RAF/USAF base at Warton aerodrome - major design and manufacture contracts included Canberra bombers and Lightning fighters. Rationalisation in the 1960s resulted in English Electric Aviation becoming 40% of the new British Aircraft Corporation. In 1961 English Electric took over Dorman Diesels Ltd which in turn had acquired W. G. Bagnall Ltd. In 1966 English Electric Diesels merged with Ruston and Hornsby which already included Paxmans. This company eventually became GEC Diesels. Elliott Automation was acquired in 1967. The following year GEC took over English Electric, ending its independent existence.

In 1959 Associated Electrical Industries (AEI) created a self-contained company named AEI Traction Division to control the railway activities of both Metropolitan Vickers Electrical Company Ltd and British Thomson-Houston (BTH). Included in this company were the interests of the Metropolitan-Vickers General Railway Signal Co., (later to become GEC General Railway Signal). The newly formed company established its headquarters, at Trafford Park, Manchester, and operated from three other sites, Attercliffe Common in Sheffield, Rugby Works, and Stockton Works supplying traction motors, machines, control gear and mechanical parts of locomotives. AEI Traction Limited’s product range encompassed electric and diesel-electric locomotives; electrical equipment for tramcars, trolley buses, trolley mining locomotives, traction motors and gears. In 1969 AEI Traction Division merged with English Electric Traction to form English Electric-AEI Traction Division.

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 British Thomson-Houston Co. Ltd., (BTH) was created as a subsidiary of the General Electric Company, USA in 1896 to exploit the sale of products in the United Kingdom. BTH was a reconstruction of an existing firm, Laing, Wharton and Down (1886). The BTH manufacturing works were based at Rugby, Warwickshire and the company’s products included induction motors, alternators, switchgear, turbo-generators and turbines, as well as a large number of rotary converters and motor converters, primarily for chemical plants. During the First World War, BTH’s most significant contribution was the development of marine apparatus for the naval service. The 1920s saw a period of vast expansion for the company with new extensions built at many of its factories such as Willesden, Birmingham, Chesterfield and Lutterworth. BTH amalgamated with Metropolitan-Vickers Electrical Company Ltd to form Associated Electrical Industries (AEI) in 1928 although both companies retained their separate identities and continued to compete for the same contracts. BTH developed manufactured electric torpedoes and electrical components for aircraft engines, munitions, etc., during the Second World War and in 1935 independently of each other, BTH and Metropolitan-Vickers were the first two companies in the world to construct jet engines.

Metropolitan-Vickers Electrical Co Ltd was the new trading name given to British Westinghouse Electric and Manufacturing Co on 8 September 1919. The predecessor company had sold its controlling share to the Metropolitan Carriage Wagon Co in 1916 in order to gain membership of the Federation of British Industries. In 1919, Vickers acquired the Metropolitan Carriage Wagon Co, along with its controlling share in British Westinghouse, prompting the change in name to Metropolitan-Vickers Electrical Co Ltd. The American owned British Westinghouse had established its English operations at Trafford Park in 1899, and Metropolitan-Vickers Electrical Co Ltd continued on the same site from 8 September 1919. The company was initially known for its electricity generators, later diversifying into the manufacture of steam turbines, switchgear, transformers, electronics and railway traction equipment. The passing of the Electricity (Supply) Act in 1926 provided a boost to the company’s post-war fortunes, with the creation of the National Grid generating demand for the company's products. In 1928, Metropolitan-Vickers Electrical Co Ltd merged with its rival British Thomson Houston Co Ltd, retaining both names for trading purposes. The following year, on 4 January 1929, Associated Electrical Industries Ltd (AEI) acquired Metropolitan-Vickers Electrical Co Ltd and the British Thomson Houston Co Ltd. Again, both trading names were retained, and a fierce rivalry was established between the firms which the parent company was unable to control. In 1931, Sir Felix Pole joined Metropolitan-Vickers Electrical Co Ltd as its new chairman. He oversaw a period of expansion for the company leading into the Second World War. In 1939, seeking a more concise name for the company, the Board of Directors decided upon Metrovicks, which became interchangeable with the official company name of Metropolitan-Vickers Electrical Co Ltd. Under Sir Felix Pole's chairmanship, Metropolitan-Vickers developed new products for the aviation industry and during the war was one of the sites where Lancaster bombers were built. In 1941, the company developed the first British axial-flow jet engine, the Metrovick F.2. Following the Second World War, the company appointed Oliver Lyttelton as chairman, with the aim of increasing the efficiency and productivity of AEI. Despite his success in achieving this aim, Lyttelton was unable to resolve the commercial rivalry between Metropolitan-Vickers Electrical Co Ltd and the British Thomson Houston Co Ltd. During his second period as chairman, from 1954-1963, Lyttelton, now Lord Chandos, oversaw the development by Metropolitan-Vickers Electrical Co Ltd of the first commercial transistor computer, the Metrovick 950. Chandos also resolved to extinguish the competition and internal divisions between Metropolitan-Vickers Electrical Co Ltd and the British Thomson Houston Co Ltd, and both company names ceased to be used from 1 January 1960, with all subsidiaries going on to trade under the name of Associated Electrical Industries Ltd.

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.

The Transport Act 1947 nationalised virtually all British transport, including the railways, waterways, and road haulage. These were transferred to a newly-created operating body, the British Transport Commission (BTC). The British Transport Commission began operations on 1st January 1948, under Chairman Sir (later Lord) Cyril Hurcomb. At this time, the British Transport Commission acquired the “Big Four” grouped railways, with virtually all minor railways as well, together with the London Passenger Transport Board. This automatically transferred the assets of the rail companies to BTC, including ships, ports, hotels, and investments in bus, coach, and haulage companies. Two bus companies, Tilling and Scottish Motor Traction, were soon added, as well as long-distance road hauliers. The Transport Act charged the British Transport Commission with the task of charged with “integrating” various forms of transport into single public service. The British Transport Commission did not directly operate transport services. Operations were delegated to five separately appointed executives: Docks and Inland Waterways, Hotels, London Transport, Road Transport, and Railways. The Railways Executive operated under the name British Railways. In 1949, the Road Transport Executive was divided into two separate executives: Road Haulage and Road Passenger. The Commission exercised financial control over these Executives, and managed them through schemes of delegation. The Commission attempted to fulfil its statutory duty to “integrate” public transport by introducing Area Schemes. These were designed to establish regional monopolies for road passenger transport, ports, and harbours. “Integration” was also to be promoted through Charges Schemes, in which the true costs of different modes of transport were to be reflected in the charges. This was designed to attract traffic to the most economic and efficient mode of transport. The structure of Executives was dramatically altered by the Transport Act 1953, which abolished all Executives, with the exception of London Transport. Responsibility for the operation and maintenance of transport systems was delegated to the chief regional managers. The railways were reorganised into a system of area boards for each of its six regions. In September 1953, Sir Brian Robertson became Chairman. Disposal of the haulage fleet also began at this time, but a lack of buyers made this difficult. Rising costs, industrial action and competition from road traffic meant that the British Transport Commission was in financial trouble by 1955. It sought relief from this by publishing The Modernisation and Re-equipment of British Railways, a plan which proposed an investment in the railways of £1,240m over fifteen years. The main features of this plan were the replacement of steam with electric and diesel traction, the electrification of principle routes, and the introduction of new coaching stock. Despite the modernisation plan, the financial position of the British Transport Commission worsened. Two government reviews, in 1956 and 1959, concluded that the Commission was unwieldy and had an insufficiently commercial outlook. Sir Brian Robertson retired in May 1961, and was replaced by Dr Richard Beeching. The BTC was abolished by the Transport Act 1962. It was replaced with five new authorities that were answerable to the Minister of Transport: the British Railways Board, the British Transport Docks Board, the British Waterways Board, the London Transport Board, and the Transport Holding Company. Dr Beeching became chair of the British Railways Board.