The English city associated with the Model T-producing Trafford Park plant was Manchester.
Ford established its Trafford Park assembly plant in 1911 in the industrial district beside the Manchester Ship Canal. Trafford Park is technically in the metropolitan borough of Trafford, but the plant was widely identified with Manchester because of its location in Greater Manchester and its close connection to the city’s industrial economy.
The factory initially assembled vehicles from parts imported from the United States. It soon began sourcing more components locally and adopted Ford’s increasingly efficient production methods. British-built Model Ts could be sold at a competitive price, helping Ford establish a strong presence in the United Kingdom.
Trafford Park remained Ford’s principal British production site until operations shifted to the company’s new Dagenham plant in Essex. Model T production and assembly continued there until 1931. During the Second World War, the site was redeveloped to produce Rolls-Royce Merlin aircraft engines under licence, adding another important chapter to its industrial history.
Leeds, Liverpool, and Birmingham were also major industrial cities, but none was the home of Ford’s Model T assembly plant described in this question.