Castle Bromwich Assembly is a factory owned by Jaguar Land Rover. It is located on the Chester Road in Castle Vale, Birmingham, England.The site was first developed as Castle Bromwich Aircraft Factory, a shadow factory for the production of aircraft by the car industry as part of the rearmament of the UK in the pre-Second World war era. After initial problems it was brought under the control of aircraft manufacturers and became one of the largest producers of aircraft during the war.