What makes The Childrens Allergy Clinic unique is the resources we have available to us within our team of paediatric allergists, dietitians and immunotherapy specialists. Please see below the profiles of some of our fantastic team.

José Costa - Consultant Paediatrician

Dr José Costa runs several allergy clinics in Leamington Spa and Oxford - focusing on the diagnosis and management of Food Allergy, Hayfever, Allergic Rhinitis, Chronic Spontaneous Urticaria and Angioedema, Eczema, Asthma and MCAS. He's also a member of the Royal College Of Paediatrics and Child Health and the British Society of Allergy and Clinical Immunology.

He is a member of the Core Group of the British Society of Allergy and Clinical Immunology, Standards of Care Committee.

He has been appointed to become an Honorary Clinical Lecturer in Allergy at Warwick Medical School.

Recently he has been appointed as a Member of the Paediatric Advisory Group for Mast Cell Action.

He is also the National and Regional (Warwickshire) advisor for Children & Young People and Allergy for the Nuffield Hospitals.

​His primary focus of interest in Allergy is in immunotherapy and desensitization, mainly to house dust mites and pollens - both sublingual and subcutaneous. José is the co-author of a study titled “Increase in Multiple Nut Reactivity with Increasing Age is Not an Artefact of Incomplete Allergy Testing”, which explored the introduction of nuts into an infant/child's diet. This research found that not introducing nuts that children are not allergic to will increase their risk of developing allergy to those nuts later in life.

Outside of the clinic, Dr Costa has a keen interest in researching and teaching paediatric allergies and is currently researching diagnostic tools for non-IgE mediated food allergies.

Nishti Udeh - Dietitian 

Nishti is an international registered dietitian who has worked across both the NHS and the private sector since 2011.

Her career started in the NHS, where she worked with adults struggling with IBS, obesity and type 2 diabetes. She moved into paediatrics in 2013 and started out covering diabetes (type 1 and 2), the paediatric acute ward and paediatric clinics where she would see food allergies, preterm and tube-fed babies.

Nishti has a deep passion for paediatric food allergy, particularly cow’s milk protein allergy. She has won awards for her work in paediatric food allergy and for her work in diabetes.

Nishti has worked as a CAHMS dietitian since 2019 and currently looks after children with eating disorders such as anorexia nervosa and avoidance restrictive food intake disorder (ARFID).

Her multiple competencies attract a wide range of patients, both children and adults.

Izzy Fahey - Social Media Manager 

Izzy is a digital marketer who set up IF Social Studio in 2023 to focus on social media marketing. Izzy handles The Allergy Clinic's social accounts including content creation, strategy, and analytics reporting.

Maria Mulliner - PR Manager

Maria is former journalist and has worked in PR and Communications for over 16 years, across various health, wellness, food, drink and lifestyle brands. At the Children's Allergy Clinic, Maria looks after our press office, media relations and brand collaborations.

Liz Taylor - Medical Secretary 

Liz is an AMSPAR certified medical secretary with over 20 years secretarial experience, both within the NHS and private medical sector. At the Children's Allergy Clinic, Liz manages all clinic bookings, patient contact and non-clinical work.