Lesley Kay qualified from Newcastle Upon Tyne in 1974. She has been a Consultant Haematologist from 1981 serving a population of 300,000 in the North East. She is the author of over 50 research papers, and 2 Text books in haematology. She was appointed medical director and clinical Haematologist AMI/HCA hospital laboratories London 1990-2012, building extensive clinical practice for both adults and children having clinics at Princess Grace Harley Street.
She now has admitting rights at King Edward VII Hospital and sees patients at 10 Harley Street and 49 Marylebone High Street.