| 23 May 1939 |
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Convention and Final Protocol regarding the Universal Postal Union (with Regulations and Airmail Provisions) |
| 27 March 1941 |
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Agreement between the Governments of the United Kingdom and the United States of America relating to the Bases Leased to the United States of America (and Exchanges of Notes) together with Protocol between the Governments of the United Kingdom, Canada and the United States of America concerning the defence of Newfoundland |
| 9 December 1948 |
12 January 1951 |
Convention on the Prevention and Punishment of the Crime of Genocide |
| 20 February 1957 |
11 August 1958 |
Convention on the Nationality of Married Women |
| 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] |
| 10 July 1964 |
1 January 1966 |
Constitution of the Universal Postal Union [with Final Protocol, General Regulations and Final Protocol thereto] |
| 10 July 1964 |
1 January 1966 |
Universal Postal Convention |
| 12 November 1965 |
1 January 1967 |
Optional Additional Protocol to the International Telecommunications Convention, Montreux 1965 Compulsory Settlement of Disputes |
| 15 November 1965 |
10 February 1969 |
Convention on the Service Abroad of Judicial and Extrajudicial Documents in Civil or Commercial Matters |
| 6 June 1966 |
1 August 1966 |
Exchange of Notes extending the application of the Extradition Treaty between Her Majesty the Queen in respect of the United Kingdom of Great Britain and Northern Ireland and His Majesty The King of Sweden, signed at London on 26 April 1963, as amended by the Protocol of 6 December 1965, to Certain Territories for whose International Relations the United Kingdom Government are responsible |
| 5 July 1966 |
17 November 1967 |
Convention between the Government of the United Kingdom of Great Britain and Northern Ireland and the Government of Israel regarding Legal Proceedings in Civil and Commercial Matters |
| 11 June 1968 |
5 September 1969 |
Customs Convention on the temporary Importation of Scientific Equipment |
| 23 May 1969 |
27 January 1980 |
Vienna Convention on the Law of Treaties |
| 25 July 1969 |
1 January 1971 |
International Health Regulations (1969) adopted by the Twenty-second World Health Assembly |
| 25 September 1975 |
15 February 1996 |
Additional Protocol No. 1 to amend the Convention for the Unification of Certain Rules relating to International Carriage by Air signed at Warsaw on 12 October 1929 |
| 25 September 1975 |
15 February 1996 |
Additional Protocol No. 2 to amend the Convention for the Unification of Certain Rules relating to International Carriage by Air signed at Warsaw on 12 October 1929 as amended by the Protocol done at The Hague on 28 September 1955 |
| 25 September 1975 |
14 June 1998 |
Montreal Protocol No. 4 to amend the Convention for the Unification of Certain Rules relating to International Carriage by Air signed at Warsaw on 12 October 1929 as amended by the Protocol done at The Hague on 28 September 1955 |
| 25 September 1975 |
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Additional Protocol No. 3 to amend the Convention for the Unification of Certain Rules relating to International Carriage by Air signed at Warsaw on 12 October 1929 as amended by the Protocols done at The Hague on 28 September 1955 and at Guatemala City on 8 March 1971 |
| 29 October 1975 |
12 August 1976 |
Extradition Treaty between the Government of the United Kingdom of Great Britain and Northern Ireland and the Government of the Republic of Finland (With Exchange of Notes signed at Helsinki on 12 May 1976 extending the Treaty to certain territories) |
|
1 October 1952 |
International Sanitary Regulations adopted by the World Health Assembly on May 25, 1951 |
|
21 December 1975 |
Convention on Wetlands of International Importance especially as Waterfowl Habitat |
|
11 March 1979 |
Amendments to Annexes I and II to the Convention on the Prevention of Marine Pollution by Dumping of Wastes and other Matter (concerning Incineration at Sea) |
|
13 April 1987 |
Amendment to Article XI paragraph 3(a) of the Convention on International Trade in Endangered Species of Wild Fauna and Flora, signed at Washington on 3 March 1973, Adopted at Bonn on 22 June 1979 |
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Resolution to amend Articles XI, XIV and XV of the Convention on the Prevention of Marine Pollution by Dumping of Wastes and Other Matter of 29 December 1972 (adopted by the Third Consultative Meeting of Contracting Parties at London on 12 December 1978) |