 A major extension involving 700 more beds was completed in 1905.The hospital was formally renamed the Southern General Hospital in 1923 and it joined the National Health Service in 1948.Upgrading of the hospital’s facilities began during the 1950s and culminated in the opening of a new maternity unit in 1970 and the completion of the Institute of Neurological Sciences in 1972, where the Glasgow Coma Scale was devised by Graham Teasdale and Bryan Jennett in 1974.