Formulae" intended for students of mathematics and related fields. Since his retirement he has concentrated on outreach activities, working with his wife to present masterclasses in mathematics and physical science in collaboration with the Royal Institution (Ri). Over the past twenty years they have both became heavily involved with the Ri and its masterclass programme, she as Clothworkers’ Fellow in Mathematics and Manager of the Masterclass Programme (2010-2015), and he as a trustee (2009-2015). References Bibliography 1945 births Living people 20th-century British mathematicians 21st-century British mathematicians Academics of the University of Hertfordshire Alumni of the University of Southampton Alumni of Imperial College London