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Colorectal Surgeon Tim Allen-Mersh, Private Clinic Treatment, Self Pay Patients

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Professor Tim Allen-Mersh, Consultant Colorectal Surgeon

Specialising in:

Anal bleeding and anal disorders, including haemorrhoids, fissure, fistula and warts; pilonidal sinus

(Unnamed Fieldset)
Specialist Details
Full name

Prof. Tim Allen-Mersh




Consultant Colorectal Surgeon

Tim Allen-Mersh

General surgery, Coloproctology

Site specialisation
Site specialisation 2
Clinical interests

Anal bleeding and anal disorders, including haemorrhoids, fissure, fistula and warts; pilonidal sinus

Background Information

Professor Allen-Mersh trained in surgery at Charing Cross and Royal London Hospitals, and completed fellowships in colorectal surgery at St Marks Hospital, London, and in cancer surgery at Memorial Sloan Kettering Cancer Centre, New York.  He was appointed as an NHS Consultant Surgeon in 1986, and awarded the title of Professor in 1997.  He has written over a hundred papers on colorectal topics - including cancer, haemorrhoids, pilonidal sinus, and incontinence.  He has been an accredited Consultant at Bupa Cromwell Hospital for over 25 years.  He specialises in fluctuation in bowel habit, anal bleeding and discomfort, haemorrhoids, pilonidal sinus.

Languages spoken


Regular Cromwell clinics


Clinic days

Mon: Tue: eveWed: Thurs: eveFri: Sat:

Appointments telephone number

0203 176 7623

Additional Career Information
Year qualified



Association of Surgeons of Great Britain and Ireland

NHS hospitals

Chelsea and Westminster


Board of Examiners, Intercollegiate FRCS Examination Board in General Surgery

Research interests

Colorectal disorders including investigation of bowel fluctuation, haemorrhoids, pilonidal sinus, anal warts, and colorectal and anal cancer.

Key published papers

Chapters on Open Haemorrhoidectomy, and Treatment of Thrombosed External Pile in Robb and Smith's Textbook of Operative Surgery, Heinneman Butterworth.  London.  1993 Pilonidal Sinus - finding the right track for treatment. British Journal of Surgery 1990; 77: 123-132. A prospective single centre study comparing computed tomography pneumocolon against colonoscopy in the detection of colorectal neoplasms. GUT  2000; 47 (6): 832-837. Pelvic connective tissue resilience decreases with vaginal delivery, menopause, and uterine prolapse.  British Journal of Surgery 2003; 90: 466-472. Anal cytology and human papillomavirus typing in the detection of anal intraepithelial neoplasia: a review of cases from an anoscopy clinic. Sexually transmitted Infections 2005; 81 (2): 142-146.


Media coverage

Our consultants regularly contribute to hospital publications, as well as national newspaper articles and television coverage.