Hopefully, this is a link to the various research guides published by The National Archives regarding doctors and nurses. https://www.nationalarchives.gov.uk/...urses#guidance

London Metropolitan Archives holds the Nightingale Archive, plus records for over 80 other hospitals including Guy's and Westminster, workhouse infirmaries, psychiatric and fever hospitals.
LMA also have research guides. From the link, scroll down the various letters for Doctors, Hospitals, Infirmaries, Nurses, Teaching Hospitals, etc, for links to those guides.

https://search.lma.gov.uk/scripts/mw...;lma]home.html

The British Red Cross Society, Museum and Archive section, holds record cards for VAD nurses who served in both World Wars.

The Florence Nightingale Museum in Lambeth Palace Road has exhibits relating to the Nightingale Training School.

The Wellcome Institute may be able to help with the whereabouts of individual hospital records. Some hospitals retain their own records, others may have deposited them in the local County Record Office.

Nursing journals (though I don't know how many are still in existence):
MIdwives' Chronicle and Nursing Notes (first published 1887)
Nursing Mirror and Midwives' Journal (1888)
Nursing Record (1888. In 1903 it became the British Journal of Nursing.)
Queen's Nurses Magazine (1904)
Nursing Times (1905)
Irish Nursing News (1922)
Irish Nurses' Magazine (1933)
The Catholic Nurse (1933)