Dr Simon Chowdhury is a Consultant Medical Oncologist based at Guy's and St Thomas' NHS Foundation Trust.

Dr Chowdhury was appointed to Guy’s hospital in 2007 to lead the medical oncology group in the treatment of urological cancers.

Dr Chowdhury received his first degree from the University of Cambridge and qualified as a doctor at Guys and St Thomas’ Medical School. He completed his PhD in tumour targeting at University College London. He also trained at St George’s and The Royal Marsden Hospitals. He was a Visiting Fellow at the Dana Farber Cancer Institute in Boston, with which he retains strong links. Between 2000 and 2003. Dr Chowdhury was a Research Fellow for Cancer Research UK.

He is actively involved in clinical trial research into urological cancer, and is a member of the London Kidney Cancer Group which aims to develop further clinical trials in the London area. He is the joint lead for the treatment of urological cancers within the South East London Cancer Network.

He has co-authored over 20 papers in peer-reviewed journals and contributed chapters to six medical texts

Professor Justin Stebbing is a Consultant Medical Oncologist based at Imperial College Healthcare NHS Trust in London.

Professor Stebbing trained in medicine at Trinity College Oxford, where he gained a triple first class degree. After completion of junior doctor posts in Oxford, he undertook a residency at The Johns Hopkins Hospital in the US, returning to London to continue his training in oncology at The Royal Marsden and St Bartholomew’s Hospitals. Professor Stebbing’s PhD research investigated the interplay between the immune system and cancer.

Professor Stebbing has published over 500 peer-reviewed papers in journals such as the Lancet, New England Journal, Blood, the Journal of Clinical Oncology, Annals of Internal Medicine, as well as writing for national newspapers and presenting new data on optimal cancer therapies at major international conferences. His focus is on new therapies in cancer, and the systemic management of patients with a variety of solid malignancies, including a number of new biomarker-based approaches, with an emphasis on circulating tumour cells. His laboratory work is concentrated on new druggable target discovery.

He is a member of the Royal College of Physicians, the American Board of Internal Medicine and the Royal College of Pathologists, and sits on the advisory Boards of five biotechnology companies. He chairs the World Vaccine Congress and is on the editorial board of a number of world leading general medical and cancer journals such as the Journal of Clinical Oncology and Oncogene and writes BMA guidelines for several cancers.