Roger spent most of his adult life working as a physician and endocrinologist, working in Birmingham, St Bartholomew’s Hospital, London and Liverpool before taking up a consultant post at the Friarage Hospital, Northallerton. Alongside his medical interests he has had a lifelong enthusiasm for mathematics as a hobby and intellectual pursuit. After retirement in 2010 he undertook several courses of study with the Open University, leading to the award of a Certificate in Mathematics in 2011. His reading of the works of Martin Gardner led to a long-lasting interest in recreational mathematics. Since 2012 he has taught mathematics on a voluntary basis to groups of year 6 primary school children who were thought likely to benefit from enrichment activities. In this teaching he has used all manner of games, puzzles and practical activities drawn from a wide variety of sources.

Roger enjoys building mathematical models, mainly polyhedra, and he uses them extensively in his teaching.