President Jonathan, a Professor of Oncology at Imperial College London, is the founder of Prostate Cancer UK.

As a clinician he has helped develop new cancer treatments that are now part of standard practice. Jonathan has written around 400 scientific research papers and chapters, 11 books on cancer, a law book, a novel and two collections of short stories. Jonathan directs a laboratory research group comprising 20 scientists and has raised funds for the building of the Hammersmith Cancer Centre. He helped establish an All Party Parliamentary Group to improve cancer treatment and rationalise cancer research throughout the UK. He has developed and led successful media campaigns to rationalise cancer treatment and change government health policy.