PARLIAMENTARY WRITTEN QUESTION
Department for International Trade: Staff (20 December 2016)

All Government Departments are bound by legal requirements concerning the right to work in the UK and, in addition, the Civil Service Nationality Rules. Evidence of nationality is checked at the point of recruitment into the Civil Service as part of wider pre-employment checks, but there is no requirement on departments to retain this information beyond the point at which it has served its purpose. Once employed, employees are invited to disclose their nationality, however this is entirely voluntary. As such, there are no total figures for the department that can be provided.