| 5 July 1912 |
|
International Radiotelegraph Convention |
| 21 June 1922 |
|
Convention between the United Kingdom and Belgium respecting Legal Proceedings on Civil and Commercial Matters |
| 11 November 1924 |
29 March 1926 |
Convention between the United Kingdom and the Czechoslovak Republic relative to Legal Proceedings in Civil and Commercial Matters |
| 22 November 1928 |
17 January 1931 |
International Convention relating to International Exhibitions |
| 25 January 1929 |
25 January 1929 |
Exchange of Notes between His Majesty's Government in the United Kingdom and the Commonwealth of Australia and the Government of India and the Italian Government concerning the Reciprocal Recognition of Passenger Ships' Certificates and Emigrant Ship Regulations |
| 27 June 1929 |
9 May 1930 |
Convention between His Majesty and His Majesty the King of Spain regarding Legal Proceedings in Civil and Commercial Matters |
| 22 December 1931 |
|
Convention between His Majesty in respect of the United Kingdom, and the Chief of State of the Republic of Estonia regarding Legal Proceedings in Civil and Commercial Matters |
| 15 October 1946 |
13 January 1947 |
Agreement of the Intergovernmental Conference on the Adoption of a Travel Document for Refugees |
| 10 May 1948 |
|
Protocol modifying the International Convention relating to Exhibitions of 22nd November, 1928 |
| 1 December 1948 |
1 December 1948 |
Exchange of Notes between His Majesty's Government in the United Kingdom of Great Britain and Northern Ireland and the United States Government for the Duty-Free Treatment of American Relief Goods |
| 22 November 1950 |
21 May 1952 |
Agreement on the Importation of Educational Scientific and Cultural Materials |
| 15 December 1950 |
4 November 1952 |
Convention Establishing a Customs Co-operation Council |
| 8 January 1952 |
|
Exchange of Notes between the Government of the United Kingdom of Great Britain and Northern Ireland and the Government of the United States of America on United States Economic Aid |
| 1 December 1956 |
2 July 1957 |
Protocol Amending the International Sugar Agreement opened for signature at London on October 1,1953 |
| 3 October 1957 |
1 April 1959 |
Universal Postal Convention [together with Final Protocol, Detailed Regulations and Annexes, Provisions concerning Air Mail with their Final Protocol and Annexes] |
| 3 October 1957 |
1 April 1959 |
Agreement concerning Postal Parcels |
| 1 December 1958 |
1 January 1959 |
International Sugar Agreement of 1958 |
| 21 December 1959 |
1 January 1961 |
International Telecommunications Convention |
| 10 July 1964 |
1 January 1966 |
Agreement concerning Postal Parcels [with Final Protocol, Detailed Regulations and Final Protocol thereto] |
| 12 November 1965 |
1 January 1967 |
Optional Additional Protocol to the International Telecommunications Convention, Montreux 1965 Compulsory Settlement of Disputes |
| 12 November 1965 |
1 January 1967 |
International Telecommunications Convention with Final Protocol, Additional Protocols I to III and Optional Additional Protocol (with Additional Protocol IV of 21 October 1965) |