Of the three advisers referred to in the previous answer, Simon McDonald has been officially based at the Cabinet Office, rather than at No. 10, as Foreign Policy Adviser to my right hon. Friend the Prime Minister, since 2007. Two other members of Foreign and Commonwealth Office (FCO) staff are based at No. 10 as foreign policy advisers. Tom Fletcher since September 2007 and Nick Catsaras since July 2008.
FCO officials at No. 10 advising the Prime Minster on foreign policy issues work very closely with officials from the Department for International Development, the Ministry of Defence and the Foreign and Commonwealth Office.