 During the First World War, St Mark's College was requisitioned by the War Office to create the 2nd London General Hospital, a facility for the Royal Army Medical Corps to treat military casualties.St John's College was established by Sir James Kay-Shuttleworth, together with Edward Carleton Tufnell, as a teacher training institution.These colleges merged in 1923, establishing a single institution in Chelsea as the College of St Mark & St John.