1. Centre for Haematology St Mary's Hospital Campus of Imperial College, St Mary's Hospital London UK
2. Synnovis Guy's and St Thomas Hospital London UK
3. The NHS Sickle Cell and Thalassaemia (SCT) Screening Programme London UK
4. UK NEQAS Haematology West Hertfordshire Hospitals NHS Trust Watford UK
5. Department of Haematology Oxford University Hospitals NHS Foundation Trust Oxford UK
6. Department of Haematology St Vincent's Hospital Dublin Ireland
7. Department of Haematology Children's Health Ireland at Crumlin Dublin Ireland
8. Department of Paediatric Haematology School of Medicine, King's College London, King's College Hospital London UK