Since May 2007 there have been no expert advisers commissioned by my right hon. Friend the Leader of the House. Information prior to 2007 can be provided only at disproportionate cost.
The Government are committed to publishing an annual list detailing the number and costs of special advisers. Information for 2007-08 was published by my right hon. Friend the Prime Minister on 22 July 2008, Official Report, columns 99-102WS.