Ann Sullivan is a Consultant Physician in Sexual Health and HIV Medicine at the Chelsea and Westminster Hospital in London and National co-lead of HIV surveillance at Public Health England. Her research interests include HIV testing and PrEP. She was a co-investigator on the PROUD study and is Chief Investigator on the PrEP Impact trial. Her HIV testing research has involved feasibility, acceptability and cost related research to provide the basis for her current implementation research. She has been involved in a number of European projects: HIDES, OptTEST, INTEGRATE, EUROTEST.