[1] In 1929, she moved to Maudsley Hospital in London, where she began to expand the service for child and adolescent psychiatry.
After the war, she joined Great Ormond Street Hospital as its first physician in charge of the department of psychological medicine.
[2] In the early 1960s, she chaired a working party that established a set of diagnostic criteria for autism, then known as "schizophrenic syndrome of childhood", based partly on 100 patients Creak had treated.
[3] A unit for autistic children in Perth, Western Australia, was subsequently named after Creak.
She developed Alzheimer's disease in the 1970s, and died from breast cancer on 25 August 1993 in Stevenage, Hertfordshire.