The Department of Health uses the revenue sharing number 0845 4647 for the health advice and information service provided by NHS Direct.
0345 4647 has been made available for use, however this has not been adopted due to some alleged connection with a proposed service for access to urgent health and social care.
The connection between non-urgent health advice and information and a focussed service for access to urgent care has not been explained.
Further information on use of revenue sharing numbers in the NHS is available
here