Guidance

Treaty Action Bulletin: September 2025

Published 1 October 2025

© Crown copyright 2025

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This publication is available at https://www.gov.uk/government/publications/treaty-action-bulletin-september-2025/treaty-action-bulletin-september-2025

1. Published in the Country Series

Exchange of Letters between the United Kingdom of Great Britain and Northern Ireland and the Republic of Türkiye amending the Free Trade Agreement between the United Kingdom of Great Britain and the Republic of Turkey

Nuclear-Powered Submarine Partnership and Collaboration Agreement between the Government of the United Kingdom of Great Britain and Northern Ireland and the Government of Australia

2.  Published in the Miscellaneous Series

Agreement on defence export controls

3.  Published in the Treaty Series

Exchange of Letters Regarding the Negotiation of a Double Contributions Convention and the Comprehensive Economic and Trade Agreement between the Government of the United Kingdom of Great Britain and Northern Ireland and the Government of the Republic of India

Convention on Mutual Legal Assistance in Criminal Matters between the United Kingdom of Great Britain and Northern Ireland and the Kingdom of Morocco

Agreement between the Government of the United Kingdom of Great Britain and Northern Ireland and the Government of the Kingdom of the Netherlands concerning Border Controls on Rail Traffic between the Netherlands and the United Kingdom using the Channel Fixed Link

Agreement between the United Kingdom of Great Britain and Northern Ireland and the Swiss Confederation on Direct Insurance other than Life Assurance [and] Decision by the contracting parties concerning the Agreement between the United Kingdom of Great Britain and Northern Ireland and Swiss Confederation on Direct Insurance other than Life Assurance

Agreement between the United Kingdom of Great Britain and Northern Ireland and the Swiss Confederation relating to Scheduled Air Services

4. Multilateral treaties: UK actions

Convention on Biological Diversity: extension to Guernsey (PDF, 54KB))

Third Additional Protocol to the European Convention on Mutual Assistance in Criminal Matters (CETS No. 227): signature

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