Headlines

Australia, Britain sign 50-year AUKUS submarine partnership treaty

Published by Global Banking & Finance Review

Posted on July 26, 2025

2 min read

· Last updated: January 22, 2026

Add as preferred source on Google
Australia, Britain sign 50-year AUKUS submarine partnership treaty
Global Banking & Finance Awards 2026 — Call for Entries

SYDNEY (Reuters) -Australia's government said on Saturday it signed a treaty with Britain to bolster cooperation over the next 50 years on the AUKUS nuclear submarine partnership. The AUKUS pact,

Australia and Britain Forge 50-Year AUKUS Submarine Agreement

SYDNEY (Reuters) -Australia's government said on Saturday it signed a treaty with Britain to bolster cooperation over the next 50 years on the AUKUS nuclear submarine partnership.

The AUKUS pact, agreed upon by Australia, Britain and the U.S. in 2021, aims to provide Australia with nuclear-powered attack submarines from the next decade to counter China's ambitions in the Indo-Pacific. U.S. President Donald Trump's administration announced a formal review of the pact this year.

Defence Minister Richard Marles said in a statement that the bilateral treaty was signed with Britain's Defence Secretary John Healey on Saturday after a meeting in the city of Geelong, in Victoria state.

"The Geelong Treaty will enable comprehensive cooperation on the design, build, operation, sustainment, and disposal of our SSN-AUKUS submarines," the statement said.

The treaty was a "commitment for the next 50 years of UK-Australian bilateral defence cooperation under AUKUS Pillar I", it said, adding that it built on the "strong foundation" of trilateral AUKUS cooperation.

Britain's ministry of defence said this week that the bilateral treaty would underpin the two allies' submarine programmes and was expected to be worth up to 20 billion pounds ($27.1 billion) for Britain in exports over the next 25 years.

AUKUS is Australia's biggest-ever defence project, with Canberra committing to spend A$368 billion over three decades to the programme, which includes billions of dollars of investment in the U.S. production base.

Australia, which this month paid A$800 million to the U.S. in the second instalment under AUKUS, has maintained it is confident the pact will proceed.

The defence and foreign ministers of Australia and Britain held talks on Friday in Sydney on boosting cooperation, coinciding with Australia's largest war games.

As many as 40,000 troops from 19 countries are taking part in the Talisman Sabre exercises held from July 13 to August 4, which Australia's military has said are a rehearsal for joint warfare to maintain Indo-Pacific stability.

Britain has significantly increased its participation in the exercise co-hosted by Australia and the United States, with aircraft carrier HMS Prince of Wales taking part this year.

(Reporting by Sam McKeith in Sydney; Editing by Jacqueline Wong)

Key Takeaways

  • Australia and Britain sign a 50-year AUKUS submarine treaty.
  • The agreement aims to counter China's Indo-Pacific ambitions.
  • The treaty involves nuclear-powered submarine cooperation.
  • The pact is Australia's largest-ever defense project.
  • The Geelong Treaty enhances UK-Australia defense ties.

Frequently Asked Questions

What is the purpose of the AUKUS treaty signed by Australia and Britain?
The AUKUS treaty aims to bolster cooperation over the next 50 years on the nuclear submarine partnership, enhancing bilateral defence collaboration.
How much is the AUKUS submarine partnership expected to cost Britain?
The bilateral treaty is expected to be worth up to 20 billion pounds ($27.1 billion) for Britain's submarine programmes.
What recent financial commitment did Australia make under the AUKUS agreement?
Australia paid A$800 million to the U.S. as the second instalment under the AUKUS agreement this month.
What military exercises are associated with the AUKUS partnership?
The Talisman Sabre exercises, involving 40,000 troops from 19 countries, are associated with the AUKUS partnership and are a rehearsal for joint warfare.
Who signed the treaty on behalf of Australia and Britain?
Defence Minister Richard Marles signed the treaty for Australia, while Britain's Defence Secretary John Healey represented the UK.

Tags

Related Articles

More from Headlines

Explore more articles in the Headlines category