NHS England -
This guide supports providers and integrated care boards to implement early screening, risk assessment and health optimisation for patients waiting for surgery. It builds on the clinical guideline Preoperative assessment and optimisation, published by a cross-specialty, multidisciplinary working group, including the Royal College of Anaesthetists, Royal College of Surgeons of England, Royal College of General Practitioners and the Centre for Perioperative Care, in June 2021.