The Waterside building in Harmondsworth, London, is the international head office of British Airways; it also houses the operational head office of BA's parent company, International Airlines Group (IAG). The building, which cost £200 million, is located on Harmondsworth Moor, northwest of Heathrow Airport, between the M4 and the M25 motorways. Waterside is on the western edge of London, near West Drayton and Uxbridge, in the Borough of Hillingdon