Armstrong Siddeley Motors
When the Great War of 1914-18 came to an end Siddeley Deasy, a relatively small but very successful aircraft and motor car company found itself, along with the rest of British industry, with an empty order book and spare capacity.
Armstrong Whitworth found itself in the same situation and considered that its huge aircraft production capacity
was something of a liability.
John Davenport Siddeley, the managing director of Siddeley Deasy, believed that there was a considerable future in aircraft manufacture and as such he approached Armstrongs with a view to combing both company’s aircraft and motor car production capabilities. The outcome was the formation in 1919 of Armstrong Siddeley, with all of Armstrong's aircraft and motor production facilities joining those of Deasy in the new company with J. D. Siddeley as managing director.