An error has been identified in the written answer given on 08 December 2014.
The correct answer should have been:
There are an estimated 250,000 people with the sickle cell trait anaemia in the United Kingdom. The Department has made no estimation of the annual cost of treating sickle cell anaemia in the National Health Service nor does it hold information on the total NHS spend on sickle cell anaemia.
The Department does hold estimated costs for admitted patient care episodes as reported by Healthcare Resource Groups. In 2013-14 the total estimated figure for sickle anaemia was £23.8 million; in 2012-13 it was £21.9 million. This figure does not include other costs such as primary and social care.