1. West Herts Hospitals NHS Trust UK NEQAS BTLP Watford UK
2. Portsmouth Hospitals NHS Trust Cytology Portsmouth UK
3. Welsh Blood Service Quality Assurance Cardiff UK
4. Oxford University Hospitals NHS Trust Blood Transfusion Oxford UK
5. TDL Pathology Blood Transfusion London UK
6. NHSBT Manchester Blood Centre Serious Hazards of Transfusion (SHOT) Office Manchester UK
7. Sottish National Blood Transfusion Service Clinical Services Laboratory Glasgow UK
8. Norfolk and Norwich University Hospitals NHS Foundation Trust Blood Transfusion Norwich UK