| 12 October 1929 |
13 February 1933 |
International Convention for the Unification of certain Rules relating to International Carriage by Air |
| 23 May 1939 |
1 July 1940 |
Universal Postal Convention, with Final Protocol, Regulations of Execution and Provisions concerning the Transportation of Regular Mails by Air, with Final Protocol. |
| 23 May 1939 |
|
Convention and Final Protocol regarding the Universal Postal Union (with Regulations and Airmail Provisions) |
| 9 July 1948 |
4 July 1950 |
Freedom of Association and Protection of the right to organise Convention, 1948 [ILO No.87] |
| 3 January 1950 |
3 January 1950 |
Exchange of Notes constituting an Agreement between His Majesty's Government in the United Kingdom of Great Britain and Northern Ireland and the Government of the United States of America to amend the Economic Co-operation Agreement signed at London, 6th July, 1948 |
| 22 December 1952 |
1 January 1954 |
International Telecommunication Convention (with Annexes, Final Protocol and Additional Protocol) |
| 18 December 1953 |
18 December 1953 |
Exchange of Notes between the Government of the United Kingdom of Great Britain and Northern Ireland and the Government of Sweden extending the provisions of the Anglo-Swedish Double Taxation Convention of 30th of March, 1949, to certain Colonial Territories of the United Kingdom |
| 21 November 1955 |
28 June 1956 |
Agreement between the Government of the United Kingdom of Great Britain and Northern Ireland and the Government of Paraguay on Trade Payments |
| 1 December 1956 |
2 July 1957 |
Protocol Amending the International Sugar Agreement opened for signature at London on October 1,1953 |
|
1 October 1952 |
International Sanitary Regulations adopted by the World Health Assembly on May 25, 1951 |