Longbridge is an area of Birmingham, England. For local government purposes it is a ward within the district of Northfield Kings Norton.Since 1905, the area has been dominated by the Longbridge plant, which produced Austin, Nash Metropolitan, Morris, British Leyland, and most recently MG Rover cars. The factory became dormant, and some parts of the older sections of the site were demolished after MG Rover fell into administration in April 2005.