In 1934 Dreyer was appointed matron for
Bethnal Green Hospital, a municipal hospital under the administrated of the
London County Council (LCC). and was described at the time as the 'largest municipal hospital organisation in the world'. Up until 1929 these hospitals had been
workhouses under the
Poor law Guardians.
World War II At the outbreak of
World War II in 1940, Dreyer was promoted to principal matron in charge This committee made recommendations on the training and qualifications of a new the assistant nurse (later known as the enrolled nurse), recruitment of nurses and education for registered nurses. Dreyer introduced training for assistant nurses into LCC hospitals in 1942 on the model recommended by the Horder Committee. In 1943 the Minister for Health,
Ernest Brown, appointed Dreyer to the Assistant Nurses Committee of the
General Nursing Council Dreyer's managerial skills in leading large scale nursing services in war were widely recognized and utilised in other arenas. In 1943 She was appointed to the
Colonial Office's Committee of inquiry into the training of nurses to work in the British Colonies;chairman
Lord Rushcliffe. In 1944 she was appointed to the
United Nations Relief and Rehabilitation Administration Committee to advise on problems of demands for nurses for relief work in the territories of Europe as they were liberated.
1948 onwards In 1948 the
National Health Service (NHS) was created, taking all voluntary and municipal funded hospitals into its administration.
Local Authorities retained administration only of their domiciliary and community health services:including
district nurses and
midwives,
health visitors and
school nurses. At a public event at
County Hall to mark the commencement of the NHS,
Herbert Morrison, then leader of the LCC, singled Dreyer out for special tribute. From 1950-53 Dreyer worked as the
World Health Organisation's advisor in Europe, advising on the reconstruction of nursing services. She continued her senior level involvement with London NHS hospitals through appointments to their boards of management: South West Middlesex Hospital (1950–1958); Stepney Hospital (1952–64);
Lewisham Hospital (1955-74, including as vice-chairman 1967-74 ). Throughout her career, Dreyer was a life member of the RCN and was president of the South East London branch. ==Death and legacy==