The TX4 is a purpose-built taxicab (hackney carriage) manufactured by The London Taxi Company (formerly LTI Vehicles), a subsidiary of Manganese Bronze which has itself been wholly owned since 2013 by Geely Automobile of China.The TX4 is the latest in a long line of purpose-built taxis produced by The London Taxi Company and various predecessor entities. The design has evolved via several mutations from the Austin FX3 of the 1950s.