 RECRUITMENT Patients with CTS will routinely be referred to the investigators centre for assessment and treatment of CTS. They would normally be referred to the centre by their GP, receive an appointment letter and attend the hospital. They would then be evaluated clinically and with nerve conduction tests. This may be by a hand surgery consultant or member of the hand team. Patients may then receive a date for surgery and would be followed up if necessary. The Principle Investigator and one Local Collaborator are both consultant hand surgeons who would receive referrals and see these patients in clinic. 