Dr David Landau MBBS MRCP FRCR is a Clinical Oncologist, working formerly at Guys and St Thomas NHS Foundation Trust. He joined Policy Exchange as a Senior Fellow in January 2022. Whilst practicing, David was engaged in academic medicine with honorary Senior Lecturer posts at both Kings College London and University College London. His main areas of research were lung cancer treatment, development of high-tech radiotherapy delivery and imaging science with over seventy peer-reviewed published papers alongside leadership or membership of various national research committees. He has led national, multi-centred clinical trials and been a lead and co-investigator on large and successful grant proposals to Cancer Research UK, the Department of Health and the Engineering and Physics Sciences Research Council. He was a founding medical consultant to Vision RT, a successful UK medical start-up company and a founding partner of LOC a private oncology clinic with multiple centres in London and Manchester.