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Online courses/webinars attended October 2025 – June 2026

Online courses/webinars attended October 2025 – June 2026

Horizons in intestinal failure, rehabilitation and home parenteral nutrition 8-10 Oct 2025

Emergency radiology – Bridging the gap: Innovation, imaging, and immediate care 10 Oct 2025

Frontiers in Colorectal and Intestinal Disease: Prevention in Practice 19-21 Nov 2025

New insights in nutrition and neurodivergence: why brain health matters 26 Nov 2025

Pilonidal Conference 5 Dec 2025

Advanced Diet Therapy for Inflammatory Bowel Disease 24 Apr 2026

Medicolegal conference 2026 7 May 2026

Intellectual disabilities: Contemporary challenges and new evidence 7 May 2026

St Marks Hospital Pelvic floor and Proctology course 1-2 Jun 2026

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Related Uncategorised

Medicolegal reporting from June 2026

Medicolegal Appointments from December 2025

Online courses/webinars attended from October 2025

Medicolegal Appointments from October 2025

Online courses/webinars attended 2025

Online courses/webinars attended 2024

Principal professional specialisms

Professor Allen-Mersh is an accredited specialist in General Surgery, including emergency surgery. He has sub-specialised in Gastrointestinal Surgery, in particular Colorectal Surgery.



Awards and accolades
Professor of Gastrointestinal Surgery, Imperial College School of Medicine, London

1997 to date

Hunterian Professor, Royal College of Surgeons of England

1985

Merit Certificates in Medicine and Surgery, St Andrews University and Dundee University Medical School

1973

Membership of professional organisations
  • Validated for Clinical Practice with General Medical Council (GMC number 1337802)
  • Fellow of the Royal College of Surgeons of England
  • Fellow Association of Surgeons of Great Britain and Ireland
  • Member Medical and Dental Defence Union of Scotland
  • Founder Member Expert Witness Institute
  • Member Medico-legal Society of London
  • Tier 1, two star approved expert, Association of Personal Injury Lawyers
  • Past member Association of Coloproctology of Great Britain and Ireland, and American Society of Clinical Oncology
  • Publications
    Professor Allen-Mersh has edited two text books of surgery, and contributed chapters to more than 20 textbooks of surgery, cancer and gastrointestinal disorders. He has published more than a hundred papers in peer-reviewed medical journals.
    Training, qualifications and accreditation as an expert witness
    Professor Allen-Mersh initially attended a Bond Solon Expert Witness Training Course in 1994. He was a founder member of the Expert Witness Institute in 1996. He is a member of the Faculty of Expert Witnesses for Doctors. He is an associate member of the Association of Personal Injury Lawyers (APIL), with whom he has 1st tier 2 star expert witness listing. He has regularly attended teaching and update conferences on personal injury assessment and medico-legal practice. He has given invited talks on various aspects of gastrointestinal conditions at the annual meetings of AVMA and APIL. He attended the Specialist Info Advanced Medico-Legal Course in June 2015, and the APIL legal training course for expert witnesses in October 2020.

    Get In Touch

    Contact details

    Secretary: Shanie Marcus-Page

    Email: office@allenmersh.co.uk

    Telephone: 020 3176 7623

    Address: All correspondence by email

    Office Opening Times: 8am – 4pm

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    Latest news

    Medicolegal reporting from June 2026

    Posted on June 10, 2026 by allenadmin

    Online courses/webinars attended October 2025 – June 2026

    Posted on June 10, 2026 by allenadmin

    Medicolegal Appointments from December 2025

    Posted on November 24, 2025 by allenadmin
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