Question to the Home Office:

To ask His Majesty's Government whether Border Force have a list of democratically elected heads of state, heads of government and ministers to ensure that inappropriate questioning does not occur when such persons enter or transit through the UK.

Border Force are legally mandated to carry out checks on 100% of scheduled arrivals into the UK, including diplomats, ministers and VIPs. Border Force do not retain a list of all Heads of State and other government diplomats, however work closely with the Foreign, Commonwealth & Development Office on any official visits.

There is specific guidance on the way Border Force handle government travel available on GOV.UK: https://www.gov.uk/government/publications/exempt-exm/exempt-exm