Manganese Bronze Holdings Manganese Bronze Holdings Manganese Bronze Holdings plc (MBH) was the holding company of LTI Limited: their sole business in their final years as a company was London black taxicab manufacturing through the LTI subsidiary. MBH was founded in 1899 and was once an important conglomerator of British motorcycle marques. The company acquired the subsidiary Carbodies in 1973, which was involved in the design, development and production of taxicabs. This subsidiary eventually became "LTI Limited", and traded first as "London Taxis International" and then as "The London Taxi Company". The sale of its components division in 2003 left the company with
Methylcyclopentadienyl manganese tricarbonyl the requirements of the European Fuel Quality Directive (2009/30/EC). The conclusions of a risk assessment are that "for MMT and its transformation products, when MMT is used as a fuel additive in petrol, no significant human health or environmental concerns related to exposure to either MMT or its transformation [combustion] products (manganese phosphate, manganese sulphate and manganese tetroxide) were identified at use at levels up to 18 mg Mn/l. Depending on the regional needs and the vehicle emission control technology available, an MMT treat rate in the range of 8.3 mg Mn/l to 18 mg Mn/l is scientifically justified and