Name
- Foreign Office, 1782-1968919
- Political Resident, Persian Gulf, 1822-1971435
- HM Ambassador to Iran, 1807-1980259
- Government of India, 1834-1947258
- Government of India, Foreign and Political Department, 1783-1937235
- Persian Gulf Political Residency, 1822-1971226
- British Legation, Tehran, c 1836-1944212
- Viceroy and Governor-General of India in Council, 1773-1947194
- Indian Political Service, External Affairs Department, 1937-1947187
- Secretary of State for Foreign Affairs, 1782-1968170
- Colonial Office, 1854-1966168
- Secretary of State for India, United Kingdom, 1858-1935123
- Government of Iran, Pahlavi dynasty, 1925-1979117
- Political Agent, Bahrain, 1905-1971101
- HM Ambassador to Saudi Arabia, 1930-100
- War Office, 1857-196496
- Air Ministry, 1918-196494
- Political Resident, Aden, 1854-193293
- Admiralty, 1708-196491
- Commonwealth Relations Office, 1947-196685