After graduating from St George’s Hospital Medical School, Adrian was awarded his PhD from University College London. He is a leader in paediatric immunology and in translation of cell and gene therapies for rare disease. He has fostered major collaborations both nationally and internationally, and with colleagues, has conducted some of the first successful trials of gene therapy in inherited immunodeficiencies. He is currently Head of the Infection, Inflammation, and Immunity at UCL Great Ormond Street Institute of Child Health, and Lead for the Cell, Stem Cell, and Gene Therapy theme at the NIHR Great Ormond Street Hospital NHS Trust Biomedical Research Centre. He has been a board member of the American Society of Cell and Gene Therapy, President of the British Society for Gene and Cell Therapy, board member of the European Society of Gene and Cell Therapy, and an NIHR senior investigator. He became a Fellow of the Academy of Medical Sciences in 2005.