I refer the hon. Member to the answers given by the then Parliamentary Secretary, Cabinet Office my hon. Friend the Member for East Renfrewshire (Mr. Murphy), on 10 March 2006, Official Report, column 1837-38W, and by the then Minister for the Cabinet Office on 26 March 2007, Official Report, column 1349W.
The Cabinet Office does not keep separate records of numbers of other communication staff, who do not all work in the central communications unit.