Dr Cleator is an experienced breast and colorectal oncologist specializing in delivery of chemotherapy, targeted treatments and radiotherapy for early and advanced disease. Her NHS base is at Imperial Healthcare Trust (Charing Cross) and she consultants privately at LOC, Harley Street. She delivers treatment privately within the HCA and London Clinic facilities.

Her initial medical training was gained at Oxford University. She has an academic background having undertaken a PhD based at the Institute of Cancer Research and Royal Marden Hospitals studying gene profiling as a means of personalizing chemotherapy delivery. She continues to be active in research and education. Particular interests include treatment of breast cancer in young women and pregnancy, neoadjuvant (pre surgical) treatment, personalization of treatment with use of gene assays and radiotherapy for early breast cancer.