This document outlines an updated guideline from the British Society of Gastroenterology, detailing the standards for diagnosing and managing adult coeliac disease (CD). A multidisciplinary panel from across the UK, Sweden, Italy and Australia contributed to the development of these guidelines. This update is prompted by recent advancements in the diagnosis and treatment of adult CD. The primary goal is to emphasise evidence-based practices to enhance the management of adult CD, with the aim of improving patient care.