This is a matter for NHS Direct NHS Trust. They have provided the data in the following table.
Month Nurse advisers Health advisers November 2005 1,043 679 December 2005 1,035 662 January 2006 1,022 652 February 2006 1,014 653 March 2006 998 649 April 2006 989 649 May 2006 960 632 June 2006 942 611 July 2006 916 584 August 2006 911 570 September 2006 879 568 October 2006 869 540 November 2006 843 539 December 2006 810 532 January 2007 800 538 February 2007 861 617 March 2007 933 656 April 2007 858 656 May 2007 836 607 June 2007 830 602 July 2007 834 574 August 2007 817 572 September 2007 810 591