[1] Horder began his career at St Bartholomew's Hospital, where his first junior post was under Samuel Gee.

[1] They also included two prime ministers, Ramsay MacDonald and Bonar Law,[1] and labour leader Hugh Gaitskell.

[citation needed] He was involved in many official committees including advising the Ministry of Food during World War II.

[1] After the war he opposed many of Aneurin Bevan's plans for a national health service and may have helped modify some of those less palatable to the medical profession.

[citation needed] From 1941 he Chaired the Horder Committee for the Royal College of Nursing with the report published in 1949.