Question: What was the ancestral home of the Trafford family, that had a manager who was an English transport engineer who began his working life developing and building gas-powered trams?

<P0-S0> The history of public transport authorities in London details the various organisations that have been responsible for the public transport network in and around London, England from 1933 until 2000 and have used the London Transport brand. <P0-S1>  Their responsibilities have encompassed the buses, coaches, trams and the London Underground. <P0-S2>  The period began with the creation of the London Passenger Transport Board, which covered the County of London and adjacent counties within a 30-mile (48-km) radius. <P0-S3>  This area later came under the control of the London Transport Executive and then the London Transport Board. <P0-S4>  The area of responsibility was reduced to that of the Greater London administrative area in 1970 when the Greater London Council, and then London Regional Transport took over responsibility. <P0-S5>  Since 2000, the Greater London Authority has been the transport authority and the executive agency has been called Transport for London; ending the 67-year use of the "London Transport" name. <SEP> <P1-S0> Trafford Park is an area of the Metropolitan Borough of Trafford, Greater Manchester, England, opposite Salford Quays on the southern side of the Manchester Ship Canal, 3.4 mi west-southwest of Manchester city centre and 1.3 mi north of Stretford. <P1-S1>  Until the late 19th century, it was the ancestral home of the Trafford family, who sold it to financier Ernest Terah Hooley in 1896. <P1-S2>  Occupying an area of 4.7 mi2 , it was the first planned industrial estate in the world, and remains the largest in Europe. <SEP> <P2-S0> Hector Hercules Bell CBE (1 December 1876 – 12 November 1964) was an Australian contractor, municipal councillor, and tramway administrator. <P2-S1>  Following an initially itinerant working life, Bell married and became a successful businessman, later being elected as a councillor to Richmond City Council. <P2-S2>  Bell was appointed to the board of the Melbourne and Metropolitan Tramways Board (MMTB) in 1919, and became the MMTB's second chairman in 1936, a position he held until 1949. <P2-S3>  Under Bell, the MMTB converted the remaining cable trams to electric trams or buses, increased the MMTB's usage of buses, and work towards modernising the tram system, while returning strong surpluses. <P2-S4>  Bell was primarily a supporter of electric trams advocating their advantages over buses. <P2-S5>  During his career he ran for a seat on the Victorian Legislative Council, and was occasionally accused of unethical behaviour. <SEP> <P3-S0> William Henry Gaunt (born in Bradford, Yorkshire, 13 January 1874 – 31 October 1951) was an English transport engineer who began his working life developing and building gas-powered trams. <P3-S1>  He was educated at Manchester Grammar School before joining the Ashbury Company in Manchester as an apprentice. <P3-S2>  The works at Ashbury supplied the trams for Britain's first gas-powered tramway, the Blackpool, St Annes and Lytham tramway, operated by the British Gas Traction Company. <P3-S3>  Gaunt transferred to the tramway company in 1896, and then became manager of a similar gas-powered scheme at Trafford Park in 1896. <P3-S4>  Following the financial collapse of the Gas Traction Company in 1898 Gaunt was appointed manager of Trafford Park's gas and electric tramways, a position he held until 1905, when the operation of the electric line was taken over by the corporations of Manchester and Salford.