Dr Sebastian Cummins is a Consultant Clinical Oncologist based at St. Luke's Cancer Centre at The Royal Surrey County Hospital in Guildford.

Dr Cummins specialises in upper and lower gastrointestinal malignancies and hepato-pancreatobiliary (liver and pancreas) malignancy.

He is based at St Lukes' Cancer Centre, from where he is involved in a wide range of research based protocols, both with regards to novel biological therapies and technical radiotherapy development.