Pat Price, MA, MD, FRCP, FRCR, Visiting Professor in the Division of Surgery within the Department of Surgery and Cancer, Imperial College London, is an academic clinical oncologist specializing in PET based molecular imaging, advanced radiotherapy techniques and translational research in oncology. She founded the charity Action Radiotherapy which acts as the secretariat to the All Party Parliamentary Group on Radiotherapy.

Professor Karol Sikora, MA, MB BChir, PhD, FRCR, FRCP, FFPM, a former chief of the World Health Organisation cancer programme, is a world respected oncologist and campaigner for better universal cancer treatment. He is Medical Director, Rutherford Health, and Professor of Medicine, University of Buckingham, UK. He was Clinical Director for Cancer Services at Imperial Healthcare for over 20 years and founded the University of Buckingham Medical School before setting up Rutherford Health, a network of integrated cancer centres which include proton therapy.