The Board of Trustees and staff are supported by a medical advisory board (MAB), which offers expert advice in the fields of HIV and nutrition. Our Senior HIV Dietitian Luke White sits on the Board, along with the following advisory members:
Liz has over 20 years of experience in HIV nursing, both in clinical and community roles. She currently works as Sister at the Grahame Hayton Unit of Royal London Hospital, the largest of three dedicated HIV services offered by NHS hospital trusts in North East London. The Unit also provides…
Dr Tristan Barber (he/them) is a Consultant Physician in HIV Medicine at the Ian Charleson Day Centre, Royal Free Hospital, Honorary Associate Professor at the Institute for Global Health, University College London, and Chair of the British HIV Association (BHIVA).
Tristan is…
Ranjababu Kulasegaram – consultant physician and training programme director for HIV/Genito-Urinary Medicine at Guy’s and St.Thomas’ NHS Foundation Trust, leads the HIV Treatment Advice Clinic with special interests in HIV/Hepatitis, HIV/Brain, …
Al (RD PhD FHEA CF) is a Clinical Academic Dietitian, working as a Consultant at Guy’s and St. Thomas’ Hospital in London, and as a Senior Lecturer in Nutritional Sciences at King’s College London. His first…
Laura Waters served on The Food Chain’s Board of Trustees from 2021 to 2025, when she took on the role of Executive Director in Global HIV Medical Affairs at Gilead Science. Keen to stay involved with The Food Chain, Laura kindly agreed to join our Medical Advisory Board.
A doctor since 1998, Laura has extensive experience…

