Deletion testing of HBA1 and HBA2 for: (a) the diagnosis of alpha thalassaemia in a patient of reproductive age: (i) who has abnormal red cell indices; and (ii) for whom thalassaemia screening was suggestive of thalassaemia; and (iii) who does not have a concurrent iron deficiency (or who, irrespective of iron status, is pregnant); and (iv) who has no historic normal cell indices; or (b) the determination of carrier status in a person: (i) who is a reproductive partner of a person with alpha thalassaemia; and (ii) who has abnormal red cell indices; and (iii) who does not have a concurrent iron deficiency; or (c) the determination of carrier status in a person: (i) who is a reproductive partner of a person with alpha thalassaemia and heterozygous 2‑gene deletion; and (ii) who has normal red cell indices