The Royal London Hospital is a large teaching hospital in Whitechapel in the London Borough of Tower Hamlets. It is part of Barts Health NHS Trust. It provides district general hospital services for the City of London and Tower Hamlets and specialist tertiary care services for patients from across London and elsewhere. The current hospital building has 845 beds, 110 wards and 26 operating theatres, and opened in February 2012. The hospital's roof-top helipad is the London's Air Ambulance operating base. The helicopter is stored overnight at RAF Northolt.