1. UK National External Quality Assessment Scheme for Blood Transfusion Laboratory Practice; Watford
2. Department of Haematology; University Hospitals of Leicester
3. NHS Blood and Transplant & University Hospitals Bristol NHS Foundation Trust
4. Institute of Biomedical Scientists and NHS Blood and Transplant
5. International Blood Group Reference Laboratory; NHS Blood and Transplant
6. Barts Health NHS Trust and NHS Blood and Transplant