Question to the Foreign, Commonwealth & Development Office:

To ask the Secretary of State for Foreign and Commonwealth Affairs, what proportion of staff on the payroll of his Department who work in Westminster are (a) British nationals and (b) nationals of another country.

This question was answered on 17th October 2016
The Aliens' Employment Act 1955 makes it a requirement that all UK based staff recruited to the Foreign and Commonwealth Office (FCO) in the UK must be British nationals or dual nationals where one of those nationalities is British.