Name
- Foreign Office, 1782-1968961
- Political Resident, Persian Gulf, 1822-1971474
- Government of India, 1834-1947276
- HM Ambassador to Iran, 1807-1980273
- Government of India, Foreign and Political Department, 1783-1937258
- Persian Gulf Political Residency, 1822-1971231
- British Legation, Tehran, c 1836-1944215
- Viceroy and Governor-General of India in Council, 1773-1947197
- Indian Political Service, External Affairs Department, 1937-1947196
- Colonial Office, 1854-1966176
- Secretary of State for Foreign Affairs, 1782-1968174
- Secretary of State for India, United Kingdom, 1858-1935128
- Government of Iran, Pahlavi dynasty, 1925-1979122
- Political Agent, Bahrain, 1905-1971106
- HM Ambassador to Saudi Arabia, 1930-101
- War Office, 1857-1964101
- Air Ministry, 1918-196498
- Admiralty, 1708-196497
- Political Resident, Aden, 1854-193296
- Commonwealth Relations Office, 1947-196688