Imperial College London


Faculty of MedicineDepartment of Metabolism, Digestion and Reproduction

Honorary Clinical Senior Lecturer



+44 (0)20 3312 1208h.williams




GI UnitClarence WingSt Mary's Campus






Powles STR, Gallagher KI, Chong LWL, et al., 2022, Effects of bowel preparation on intestinal bacterial associated urine and faecal metabolites and the associated faecal microbiome, Bmc Gastroenterology, ISSN:1471-230X

Alexander JL, Kennedy NA, Ibraheim H, et al., 2022, COVID-19 vaccine-induced antibody responses in immunosuppressed patients with inflammatory bowel disease (VIP): a multicentre, prospective, case-control study, The Lancet Gastroenterology & Hepatology, Vol:7, ISSN:2468-1253, Pages:342-352

Alexander J, Powell N, Liu Z, et al., 2022, A prospective, case-control study of COVID-19 vaccine-induced antibody responses in immunosuppressed patients with IBD, The Lancet Gastroenterology & Hepatology, ISSN:2468-1253

Radhakrishnan ST, Alexander JL, Mullish BH, et al., 2022, Systematic Review: The association between the gut microbiota and medical therapies in inflammatory bowel disease, Alimentary Pharmacology and Therapeutics, Vol:55, ISSN:0269-2813, Pages:26-48

Moore-Gillon C, Suleiman S, Mullish BH, et al., 2021, Faecal microbiota transplant in the treatment of Clostridioides difficile infection: an update, European Medical Journal Gastroenterology, Vol:10, ISSN:2054-6203, Pages:60-68

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