Question to the Ministry of Defence:

To ask the Secretary of State for Defence, what is the full scope of the bilateral Nuclear-Powered Submarine Partnership and Collaboration Treaty regarding the a) design, b) build, c) operation, d) sustainment and e) disposal of SSN-AUKUS submarines.

The Government is fully committed to AUKUS. The Nuclear-Powered Submarine Partnership and Collaboration Treaty is a key part of this partnership and will enable comprehensive cooperation between the UK and Australia on the design, build, operation, sustainment, and disposal of our SSN-AUKUS submarines. This includes port visits, and notably HMS ANSON has recently arrived in Perth, Australia – a major milestone that will see Australian personnel conducting maintenance on the Astute Class submarine.

The text of the treaty can be found here:

https://assets.publishing.service.gov.uk/media/68b1814ecc8356c3c882a8dc/CS_Australia_2.2025_Nuclear_Powered_Submarine_Partnership_Agreement.pdf