| Southampton NHS Foundation Trust | South West Immunology and Allergy Network |
| Barts Health NHS Trust | South London, Kent, Surrey & Sussex
North Thames, Essex, Oxford and Cambridge |
| Oxford University Hospitals NHS Foundation Trust | South London, Kent, Surrey & Sussex
North Thames, Essex, Oxford and Cambridge
|
| North Bristol NHS Trust | South West Allergy & Immunology Network |
| Frimley Health NHS Foundation Trust | South London, Kent, Surrey & Sussex
North Thames, Essex, Oxford and Cambridge |
| Nottingham University Hospitals NHS Trust | Trent Regional Immunology & Allergy Consortium (TRIAC) |
| Sheffield Teaching Hospitals NHS Foundation Trust | Trent Regional Immunology & Allergy Consortium (TRIAC) |
| Salford Royal NHS Foundation Trust | North West Allergy & Clinical Immunology Network |
| NHS Lothian | Unknown |
| Cambridge University Hospitals NHS Foundation Trust | South London, Kent, Surrey & Sussex
North Thames, Essex, Oxford and Cambridge |
| Central Manchester University Hospitals NHS Foundation Trust, Manchester Royal Infirmary | North West Allergy & Clinical Immunology Network |
| Epsom & St Helier University Hospitals NHS Trust | South London, Surrey & Sussex Network
|
| Hull and East Yorkshire Hospitals NHS Trust | Trent Regional Immunology & Allergy Consortium (TRIAC) |
| Cardiff and Vale University Health Board | South West Immunology and Allergy Network |
| NHS Tayside | The Scottish Paediatric & Adolescent Infection & Immunology National Managed Clinical Network (SPAIIN) |
| Sandwell and West Birmingham NHS Trust | West Midlands Immunology Network |
| Papworth Hospital NHS Trust | South London, Kent, Surrey & Sussex, North Thames, Essex, Oxford and Cambridge Network |
| Lancashire Teaching Hospitals NHS Foundation Trust | North West Allergy & Clinical Immunology Network |
| Leeds Teaching Hospitals NHS Trust | Northern Immunology & Allergy Network |
| University Hospitals of Leicester NHS Trust | Trent Regional Immunology & Allergy Consortium (TRIAC) |
| NHS Grampian | Not a part of any network |
| University Hospital North Midlands | West Midlands Immunology Network |
| Central Manchester University Hospitals NHS Foundation Trust, Royal Manchester Children's Hospital | North West Allergy & Clinical Immunology Network |
| Newcastle upon Tyne Hospitals NHS Foundation Trust, Great North Children's Hospital | Northern Paediatric Immunology Network |
| University Hospitals Bristol NHS Foundation Trust | South West Immunology and Allergy Network |
| Plymouth Hospital NHS Trust | South West Allergy & Immunology Network |
| Newcastle Upon Tyne Hospitals NHS Foundation Trust, Royal Victoria Infirmary | Northern Immunology & Allergy Network (NIAN) |
| Belfast Health and Social Care Trust | Unknown |
| The Royal Liverpool University Hospital | North West Allergy & Clinical Immunology Network |
| The Dudley Group NHS Foundation Trust | West Midlands Immunology Network |
| Heart of England Foundation Trust | West Midlands Immunology Network |