Works photographic negative of cables on wall, Balham substation, London Underground

Walter T Glover established his wire manufacturing company in 1868, occupying premises at the Bridgewater Street Iron Works in Salford. W T Glover & Co, known as Glover’s, originally made cotton-covered and braided, insulated copper wires for use on bell, signalling and telephone circuits. As trade developed, the company moved to the Springfield Lane Cable Works in 1880. At this time, factories and larger private homes were beginning to install electric lighting, which required better insulated cable. Glover's started to manufacture cables covered with between one and three layers of rubber strip, waterproof tape and compounded cotton braid. In the late 1880s, Glover's began to make lead-sheathed cables for underground use. The company became a limited company and moved to Trafford Park in 1898, securing the exclusive rights for the supply of electricity to all the roads, streets and premises of Trafford Park. In June 1919, Vickers Ltd took over Glover's. Although Vickers held most of the shares, Glover's kept its name and management. In 1929 the Vickers group reorganised and sold its shares in Glover's to Sir Tom Callendar of Callendar Cable and Construction Co. Some shares later went to W. T. Henley's Telegraph Works Ltd. and British Insulated Cables.

In 1945, Glover’s became part of British Insulated Callenders Cables Limited, following the merger of Callenders Cable and Construction Co and British Insulated Cables.

During the 1950s, Glover’s developed high voltage submarine power cables, used to link centres of population with sources of generation. The parent company formed a subsidiary, BIC (Submarine) Cables Ltd, to manufacture and install the Glover’s cables. Glover's submarine cables linked England and France, and the north and south islands of New Zealand. Increasing competition from other cable manufacturing companies resulted in the south side of Glover’s Trafford Parks works integrating with the newly formed Wiring and General Cables Division of the British Insulated Cables Company (BICC). The Trafford Park factory closed in 1970, but the Glover’s brand continued as part of BICC.

The brand London Transport came into being in 1933 and remained until 2000. Prior to 1933, the transport system in London was owned and managed by several independent and separate organisations. The Underground railways were developed and owned by the Underground Electric Railways Company of London (est. 1902) and the Metropolitan Railway (est. 1863) whilst the Tram and Trolleybus networks were under the control of various local authorities and public companies. The London County Council operated tram routes within the County of London but its responsibility did not extend to the bus or tram routes that ran outside its area and it did not hold responsibility for the railways which also extended into neighbouring counties.

From 1933, the London Passenger Transport Board (LPTB) was established in accordance with the 1933 London Passenger Transport Act and covered both the County of London and adjacent counties within a 48-km radius. For the first time services within the London area were amalgamated. A significant proportion of tram routes were brought under the responsibility of the LPTB, as were the Underground Electric Railways Company of London lines and the bus services; this became known as the London Passenger Transport Area. It was then that the familiar ‘roundel symbol’ (designed in 1918) and the tube map designed in 1931 were adopted by the LPTB.

The second World War was to cause some disruption to the ongoing programme, resulting in delays and also the abandonment of some projects. During the post war years, the transport authority was the London Transport Executive until 1962. It was taken into public ownership and London Transport and British Railways were under the same jurisdiction for the first and only time. It was during this time that recruitment began directly from the Caribbean and work began on resolving war damage to stock and stations as well as the completion of projects previously delayed during the war. The post-war years also saw some major developments within London transport, including the withdrawal of both trams and trolleybuses and the introduction of the iconic AEC Routemaster bus in 1956.

From 1963, the transport authority was the London Transport Board until 1969 and it reported directly to the Ministry of Transport and no longer held direct association with the management of British Railways. Public transport was not heavily invested in during this period and motor cars increased in popularity. Unprofitable railways across Britain were also closed. The 1960s also witnessed the opening of the underground Victoria line and also the introduction of the single-deck bus.

From 1970, the Greater London Council was the transport authority and remained so until 1984. Control of green-coloured country buses and Green Line Coaches were passed on to London Country Bus Services which became part of the National Bus Company. As with many organisations during this period, London transport suffered a severe lack of funding from central government as well as major staff shortages. The inter-modal zonal ticketing system was also introduced in 1981.

From 1984-2000 London Regional Transport was the transport authority and was also under direct state control, reporting to the Secretary of State for Transport. Under the London Regional Transport Act in the 1980s subsidiary companies were established to run Underground and bus services. This period also saw the inclusion of British Rail services into fare options and the opening of the Docklands Light Railway in 1987.

From 2000 to the present day, the transport authority has been Transport for London (TfL). Unlike its predecessors, it has never been commonly known as London Transport and holds responsibility for many other transportation functions such as road management, taxi and private hire licensing and also cycling and walking. Responsibility for the Underground was not given until 2003. TfL have been the longest running transportation organisation in London to date.