The accent at this Boeing subsidiary is decidedly British. Boeing, the world's largest aerospace company, does business in the UK -- where it spends about $1 billion annually on the country's aerospace industry -- through subsidiaries such as Boeing United Kingdom Limited, tasked with overseeing Boeing's UK activities. Included among those operations is Boeing Defence UK, which serves the UK Ministry of Defence and the US military by providing support for the Apache and Chinook helicopters, C-17 aircraft, and other technologies. Boeing Commercial Airplanes in the UK provides finance, leasing, and service for commercial aircraft from its headquarters near London's Heathrow Airport.