Imperial College School of Medicine in the context of "United Hospitals"

The Imperial College of Science, Technology and Medicine, known by its trade names Imperial College London and Imperial, is a public research university in London, England. Its history began with Prince Albert, husband of Queen Victoria, who envisioned South Kensington as a cultural district with museums, colleges, and the Royal Albert Hall. In 1907, these colleges – the Royal College of Science, the Royal School of Mines, and the City and Guilds of London Institute – merged to form Imperial College London.

In 1988, Imperial merged with St Mary's Hospital Medical School and then with Charing Cross and Westminster Medical School to form the Imperial College School of Medicine. The Imperial Business School was established in 2003 and officially opened by Queen Elizabeth II. Formerly a constituent college of the University of London, Imperial became an independent university in 2007.

St Mary's Hospital is a teaching hospital in Paddington, in the City of Westminster, London, founded in 1845. Since the UK's first academic health science centre was created in 2008, it has been operated by Imperial College Healthcare NHS Trust, which also operates Charing Cross Hospital, Hammersmith Hospital, Queen Charlotte's and Chelsea Hospital and the Western Eye Hospital.

Until 1988 the hospital ran St Mary's Hospital Medical School, part of the federal University of London. In 1988 it merged with Imperial College London, and then with Charing Cross and Westminster Medical School in 1997 to form Imperial College School of Medicine. In 2007 Imperial College became an independent institution when it withdrew from the University of London.

Charing Cross Hospital is district general hospital and teaching hospital located in Hammersmith in the London Borough of Hammersmith and Fulham. The present hospital was opened in 1973, although it was originally established in 1818, approximately five miles east, in central London.

It is part of Imperial College Healthcare NHS Trust and is the primary teaching hospital of the Imperial College School of Medicine. It is a tertiary referral centre for neurosurgery, and is a national centre of excellence for gestational trophoblastic disease. It currently houses the serious injuries centre for West London. In recent times, the hospital has pioneered the clinical use of CT scanning.

Hammersmith Hospital, formerly the Military Orthopaedic Hospital, and later the Special Surgical Hospital, is a major teaching hospital in White City, West London. It is part of Imperial College Healthcare NHS Trust in the London Borough of Hammersmith and Fulham, and is associated with the Imperial College Faculty of Medicine. Confusingly the hospital is not in Hammersmith but is located in White City adjacent to Wormwood Scrubs and East Acton.

St Mary's Hospital Medical School was the youngest of the constituent medical schools of Imperial College School of Medicine, founded in 1854 as part of the new hospital in Paddington. During its existence in the 1980s and 1990s, it was the most popular medical school in the country, with an application to place ratio of 27:1 in 1996.

St Mary's continued comparatively unmoved by the other nomadic medical schools in the area, until its merger with Imperial College in 1988, and the foundation of Imperial College School of Medicine in 1997 by the merger with Charing Cross and Westminster Medical School.

Charing Cross Hospital Medical School (CXHMS) was the oldest of the constituent medical schools of Imperial College School of Medicine.

Charing Cross remains a hospital on the forefront of medicine; in recent times pioneering the clinical use of CT scanning, reflective of its position as one of the most important neuroscience centres in London; and advances in oncology and chemotherapy. Students of the medical school have benefited from this expertise, with many taking a research interest in these areas during their training.

The Westminster Hospital Medical School was one of the constituent medical schools of Imperial College School of Medicine. It was formally founded in 1834 by George Guthrie, an ex-military surgeon – although students had been taken on at Westminster Hospital almost from the hospital's foundation in 1719.

The hospital and medical school moved to larger buildings several times in the decades that followed, leading to conflict among the staff on several occasions. Guthrie's forceful urgings on retaining the location of the hospital and school on one occasion resulted in an argument climaxing in a pistol duel between two surgeons (though each missed each other).