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.

Brian Braithwaite was born in Devonport in 1938 and moved with his family to Salford in 1940. He was a Technician Apprentice at Associated Electrical Industries from 1956 to 1961, during which period he spent time in the Scientific Apparatus Department assisting engineers in design work on NMR Spectroscopy and Mass Spectrometry. At the end of his apprenticeship, he joined the Mass Spectrometry Group as a junior development engineer progressing to development engineer in 1963. During this period, he worked on one of the first commercially available Mass Spectrometers, the Type MS2, and the more advanced MS7, MS9, and MS12. Following his time at AEI, Mr Braithwaite worked as a senior research assistant at Unilever Research, Colworth, Bedfordshire. In 1974, he moved to Applied Research Laboratories (ARL) in Luton as a senior engineer, working on the design of ICP Spectrometers. ARL was a subsidiary of the optics company Bauch and Lomb, affording Mr Braithwaite the opportunity to work in the USA. From 1979 to 1984, Mr Braithwaite worked as a senior development engineer at Applied Chromatography Systems in the electronics team, developing Liquid Chromatography instruments. From 1984 to retirement in 2004, Mr Braithwaite was a self-employed consultant working on instrument and robotic projects, later servicing some of the instruments he helped to design during his career.