[2] His main clinical interests have revolved around sphincter saving procedures and his scientific endeavours have concentrated on gastrointestinal pathophysiology.

He was a member of the Secretary of State for Health’s Transparency Group (2014–15), chaired the European Working Time Regulations Taskforce (2013–14), co-chaired the Duty of Candour Review (2014) and was the Medical Advisor to Sir Robert Francis’ Freedom to Speak Up Review (2014–15).

[7] In October 2015, he was appointed senior clinical adviser to the then Secretary of State Jeremy Hunt.

[8] During this period he chaired a Rapid Review of Gross Negligence Manslaughter in Healthcare commissioned by Her Majesty’s Government which reported in June 2018.

[9] Between 2016 and 2019, he was a Non Executive Director at St George's NHS Foundation Trust and is at present Chair of the National Clinical Improvement Programme (NCIP) which is an integral part of the Getting Right First Time (GIRFT) initiative, Chair of the Independent Reconfiguration Panel (IRP) and a board member of the Private Healthcare Information Network (PHIN).