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British Aerial Transport Co (BAT) of Conduit St, London, aircraft manufacturer.
1917 The company was formed by Samuel Waring who employed Frederick Koolhoven as his Chief Designer, and Robert Noorduyn as the Chief Draughtsman. Koolhoven's first design for the company was the F.K.22 fighter, a single seater biplane.
It was followed by the FK 23 Batam that underwent commenced flight tests in 1918.
c.1918 George Dowty worked for the business.
1919 Lord Waring reduced his aviation interests and this forced the closure of the company. The fourth F.K .26 was the last aircraft built by the company.
1920 At the International Aero Exhibition at Olympia the company showed the 'BAT' commercial plane that could seat five and the 'Crow' monoplane powered by a 40 hp engine. 
1922 Company still listed in directory.
1949 Struck off the register of public companies