Guy Leschziner is a consultant neurologist at Guy’s and St Thomas’ Hospitals in London, where he leads the Sleep Disorders Centre, one of the largest sleep services in Europe, and professor of neurology and sleep medicine at King’s College London.

Alongside his clinical work, he is the presenter of the "Mysteries of Sleep" and "Senses" series on BBC Radio 4 and BBC World Service, is editor of the forthcoming Oxford Specialist Handbook of Sleep Medicine (OUP), and is Neurology Section editor for the next edition of Principles and Practice of Sleep Medicine (Elsevier).