Professor Foster has a long-standing interest in the management of chronic viral hepatitis and runs a clinical research program studying the natural history of viral hepatitis, its impact upon patients and their communities and novel therapies for this disease. He supervises a laboratory research program investigating the basic virology of hepatotropic viruses novel replication models for hepatitis C. He is the editor of The Journal of Viral Hepatitis and has published widely in the field of viral liver disease. He is a past President of BASL, NHSE Clinical Lead for Hepatitis C, Chairman the NHSE Hepatolbiliary Specialised Commissioning Clinical Reference Group