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The London Clinic


  • Oncology

Sub specialties

  • Chemotherapy
  • Radiotherapy
  • Cyberknife
  • Biological therapies
  • Immunotherapy

Clinical interests

  • Cyberknife
  • Immunotherapy of cancer
  • Advanced and complex radiotherapy techniques
  • Cancer imaging techniques
  • Unknown primary cancers

Professional profile

Dr Gaya qualified at St George’s Hospital Medical School (University of London) where he was awarded a distinction and several academic prizes. He trained in Clinical Oncology at Imperial College and St Bartholomew’s Hospital and subsequently undertook a Cancer Research UK MD Fellowship at University College London.
Dr Gaya treats solid tumours using chemotherapy, radiotherapy, and biological therapies - His main focus is on colon cancer, cancers of the oesophagus, stomach, pancreas, liver, rectum and more

Dr Gaya’s main research interests are functional cancer imaging, where he is looking for ways to assess response to treatment much earlier, and techniques for assessing blood flow and oxygen levels within cancers.
He is also interested in developing drug treatments that can cut off the blood supply to cancers, or stop cancers making new blood vessels. He is heavily involved with the implementation of the latest radiotherapy techniques such as IMRT, IGRT and Tomotherapy, combining targeted or anti-vascular drugs with radiotherapy, and stereotactic body radiosurgery.
He was one of the first UK doctors to use CyberKnife robotic radiosurgery. He has published widely in peer-reviewed journals, He is a principle investigator on a number of national and international clinical trials.
Specialist Cancer Interests: Colon, rectum, anus, oesophagus, stomach, pancreas, liver, unknown primary, CyberKnife robotic radiosurgery, complex radiotherapy planning.

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Current posts

  • Consultant Clinical Oncologist
    Guy's and St Thomas' NHS Foundation Trust

Medical training

Year qualified
  • St Georges Hospital Medical School
    1989 - 1995

Ages treated

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Clinic location

116 Harley Street
London W1G 7JL
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Clinic times

Monday: Ad Hoc
Tuesday: Ad Hoc
Wednesday: Mornings
Thursday: Afternoon


Mori Heydari
020 7009 4265

Online network

Main switchboard: +44 (0) 207 935 4444

Treatment enquiries: +44 (0) 207 616 7693Consultant appointments: +44 (0) 207 616 7693 Prices for self funding patients: +44 (0) 203 219 3315Physiotherapy appointments: +44 (0) 207 616 7651X-ray and scan appointments: +44 (0) 207 616 7653Invoice and payment enquiries: +44 (0) 207 616 7708

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