Mr Christos Tolias is a leading neurosurgeon based in London. Practising at the London Neurosurgery Partnership and King's College Hospital, where he serves as clinical lead. He is also lead for neurovascular surgery, specialising in vascular problems of the brain and spinal cord as well as spinal problems that cause sciatica, arm pain and back pain. In 2006 he became the first surgeon in Britain to carry out a non-occlusive cerebral vascular bypass operation, his team re-routed the blood supply within the brain of a patient using ELANA technology. He is the director of the only accredited Neurovascular Clinical Training Fellowship from the Royal College of Surgeons in the UK and has large research experience with an extensive publication record.