| Country | Organisation | Sites | Status |
| England | North Bristol NHS Trust |
| Accredited |
| England | Nottingham University Hospitals NHS Trust |
| Accredited |
| England | Royal Brompton And Harefield NHS Foundation Trust |
- Department of Allergy & Clinical Immunology
| Accredited |
| England | University Hospitals Of North Midlands NHS Trust |
- Royal Stoke University Hospital
| Accredited |
| England | University Hospitals Birmingham NHS Foundation Trust |
- Birmingham Heartlands Hospital
| Accredited |
| England | University Hospitals Of Leicester NHS Trust |
| Accredited |
| England | Plymouth Hospitals NHS Trust |
| Accredited |