Question to the Department of Health and Social Care:

To ask the Secretary of State for Health and Social Care, whether NHS England sets minimum target trough levels of blood factor concentrate for the treatment of patients with (a) haemophilia A and (b) haemophilia B; and what processes NHS England has in place to determine appropriate trough levels.

NHS England commissions the services for the clinical management of haemophilia A and haemophilia B as per current British Society for Haematology guidelines, which stipulate a minimum target trough factor level of 1% for Factor VIII. This target trough level is also applied to Factor IX in the management of haemophilia B. NHS England does not monitor, observe or determine individual or population trough levels.