1 Department of Surgery and Cancer, Imperial College, London, UK; Chairman of Trustees, Radiotherapy UK, London, UK. Electronic address: pprice@imperial.ac.uk.
2 Institute of Cancer Policy, Kings College London, London, UK.
3 Wilmslow Health Centre, Cheshire, UK.
4 Check4Cancer, Cambridge, UK; School of Medicine, Anglia Ruskin University, Cambridge, UK.