Offering current clinical expertise for your family

Dr Tom Marrs

PhD  MA(Cantab)  MSc  RCPCH  HFEA  BA

Consultant in Paediatric Allergy, Guy’s & St Thomas’ Trust

Senior Honorary Lecturer in Paediatric Allergy, School of Immunobiology, King’s College London

Director of the Allergy Academy, King’s College London

Expertise and Collaborations

Throughout my career, I have gained from the experience and insights of impressive clinicians and brave translational researchers.  We only offer what we can on the shoulders of others, and I work to build a better network of expertise and clinical care across my professional sphere.

Clinical Lead

I am Consultant Lead for two services within the Children's Allergies Department at Evelina London, Guy's & St Thomas', one of only four European centres to hold the World Allergy Organisation recognition as a Centre of Excellence. I lead the Allergy Prevention Service for young children, and the re-development of the Joint Gastroenterology and Allergy Clinic.


My PhD investigated how parenting choices and exposure to micro-organisms may influence the development of eczema, food allergy and airway disease. I continue to investigate the microbiome and how to best put translational research into practice.

Allergy Education

I led the development of the British Society of Allergy and Clinical Immunology Society Conference from 2018 - 2020. I have been Director of the Allergy Academy for 3 years, working from within King's College London. We are now collaborating with he Royal College of GPs, National Allergy Networks and Specialist Allergy Groups.

back of head

I wanted to say a big thank you for spending so much time in an appointment once with me. You answered all of our many questions, explained everything and nothing was too much trouble. This really impacted me; thank you so much!.