Question to the Cabinet Office:

To ask the Minister for the Cabinet Office, how many staff working (a) at No. 10 Downing Street and (b) for the Prime Minister (i) have been allowed to attend National Security Council meetings and (ii) had access to Top Secret meetings or documents without being required to have had a security vetting, since May 2010.

Attendance at internal meetings is not normally disclosed.

It has been the policy of successive governments not to comment about staff subject to national security vetting.