To ask the Prime Minister which non-civil-service special advisers accompanied her on official visits abroad on each of the last 11 years; and what was their cost to public funds, in real terms.

For years before 1987–88 the information requested is not readily available and could be obtained only at disproportionate cost. Since 1 April 1987, no special adviser who is not a career civil servant has accompanied me on an official visit abroad.