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Areas of Expertise

Mr Warren performs a range of treatments, including:

  • Diagnostic and therapeutic colonoscopy and flexible sigmoidoscopy (JAG Accredited)
  • Rafaelo® procedure, HALO Procedure and Ligasure Haemorrhoidectomy
  • LIFT and VAAFT procedures for fistula-in-ano
  • Laparoscopic (‘keyhole’) groin and abdominal hernia repair and abdominal wall reconstruction
  • Minimal access/ laparoscopic surgery
  • Day-case pilonidal disease treatments

Some of the conditions he commonly treats are:

  • Haemorrhoids
  • Fistula-in-ano
  • Fissure-in-ano
  • Pilonidal Disease
  • Groin hernias
  • Colorectal cancer
  • Inflammatory bowel disease

Personal Biography

Mr Oliver Warren BSc (Hons) MBBS (Hons.) MD (Res.) FRCS (Gen.Surg.) qualified from Imperial College London in 2001, coming top of his class in both medicine and surgery. He gained his doctorate in 2009, from Imperial College London. In 2012, he became a Fellow of the Royal College of Surgeons for which he was awarded the ASGBI Gold Medal for outstanding performance. Prior to becoming a consultant he undertook colorectal surgery fellowships at St. Mark’s Hospital, London and the Royal Prince Alfred Hospital, Sydney. He was the 2013 Association of Coloproctology’s visiting fellow at the Cleveland Clinic, Ohio, USA. All three hospitals are world-famous tertiary referral centres specialising in colorectal disease. In 2015 he was appointed consultant in colorectal surgery at Chelsea and Westminster Hospital and honorary clinical senior lecturer in the Department of Surgery and Cancer at Imperial College London. Oliver is now the Clinical Director of Surgery at Chelsea and Westminster Hospital.

Research and Awards

Oliver has published over 100 peer reviewed publications and book chapters on a diverse range of subjects including colorectal and hernia surgery, medical leadership, patient safety and surgical education. In 2015, he published his first book entitled ‘Going into Hospital? A guide for patients, carers and families‘ which seeks to engage patients in their care throughout the entire pathway and help patients improve their quality of care directly. In 2008 he worked at the Department of Health as a Clinical Adviser to the Under-Secretary of State for Health. From 2007-2014, he was the founder and clinical lead of Prepare to Lead: a prize-winning leadership development mentoring programme commissioned by NHS London. He has held a number of advisory roles to public, private and third-sector organisations.

Getting to know Mr Oliver Warren…

Oliver is married and has one daughter. He enjoys spending time with his family, fitness training, travelling, skiing and diving and is a keen oenophile and epicurean!

“I joined OneWelbeck to deliver world class diagnostics and day-case surgery for patients with digestive and abdominal health issues. I am incredibly excited about working alongside truly outstanding colleagues to ensure that patients receive a service unparalleled in terms of both standards of surgery and patient experience. Digestive Surgery at OneWelbeck will re-define what ‘good looks like’ in my area of healthcare and I’m excited to be a part of the team that will do that.”

Mr Oliver Warren

Information For GPs

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