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General enquiries:
+44 (0)207 935 4444
Book an appointment:
+44 (0)207 616 7693
Self-pay enquiry:
+44 (0)203 219 3315
The London Clinic
Dr Thomas-Gibson has a clinical, academic and research interest in making endoscopy - and specifically, colonoscopy - a safe, dignified, comfortable and accurate examination.

Make an appointment

Fast track your treatment with Dr Siwan Thomas-Gibson. Call us on 020 3944 1073.

Book appointment now

Your call may be recorded for training and monitoring purposes.

Specialties and sub-specialties

Gastroenterology
Endoscopy
Bowel cancer screening (accredited bowel screener since 2007)
Detection and prevention of bowel cancer
Therapeutic colonoscopy
Diagnosis and management of luminal gastroenterology conditions
Diagnosis and management of inflammatory bowel disease

Professional profile

Dr Thomas-Gibson has a clinical, academic and research interest in making endoscopy and specifically colonoscopy a safe, dignified, comfortable and accurate examination.

As a sub-specialist her career to date has driven this forward both nationally and internationally.

Dr Thomas-Gibson works closely with a team of like-minded allied professionals who share the same ethos, providing a high level of continuity of care if other tests or treatments are necessary.

Current posts

  • Consultant Gastroenterologist/Specialist Endoscopist and Deputy Director Bowel Cancer Screening
    St Mark's Hospital
  • Chair Joint Advisory Group for Gastrointestinal Endoscopy (Since Jan 2017)
    Royal College of Physicians

Current teaching posts

  • Honorary Senior Lecturer
    Imperial College London

Medical training

Year qualified 1992
  • St Mary's Hospital/Imperial College London 1986

Articles

Bowel cancer, symptoms and screening
The London Clinic feature
For Bowel Cancer Awareness Month, Dr Siwan Thomas-Gibson discusses the disease and the importance of screening.

Medical Admissions

A nurse with a patient

Facilitating acute admissions into The London Clinic whilst maintaining the highest levels of safety and care, supported by a consultant on-call rota.

Concierge service

Chauffeur loading suitcases into a luxury car

We can support our patients with travel, hotel accommodation, London tours, plus theatre and restaurant reservations.

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Main numbers

General enquiries: 020 7935 4444 Appointments: 020 7616 7693 Self-Pay: 020 3219 3315

Other numbers

Concierge service: 020 3219 3323International office: 020 3 219 3266Invoice and payment enquiries: 020 7616 7708

Your call may be recorded for training and monitoring purposes.

Medical service numbers

Breast services appointments: 020 7616 7653 Diagnostics appointments: 020 7616 7653 Endoscopy appointments: 020 7616 7760 Eye centre appointments: 020 7616 7768 Haematology appointments: 020 7535 5503 Kidney services appointments: 020 7224 5234 Liver services appointments: 020 7616 7719 Physiotherapy appointments: 020 7616 7651 Radiology appointments: 020 7616 7653

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