Australia has purchased the first British-built components for nuclear reactors that will power its future SSN-AUKUS stealth submarines, marking a significant step in the trilateral AUKUS defence partnership.

The AUKUS pact, established in 2021 by Australia, Britain, and the U.S., aims to equip Australia with nuclear-powered attack submarines starting in the next decade to counter China's growing influence in the Indo-Pacific. This year, the U.S. President Donald Trump's administration announced a formal review of the pact.

Despite an ongoing U.S. review, Donald Trump and Keir Starmer have agreed to move forward with the multi-billion dollar AUKUS submarine pact.

The Australian government said on Thursday that it remains committed to the AUKUS security deal despite the U.S. launching a review of the pact.

The United States has begun a review of its high-stakes submarine agreement with the United Kingdom and Australia, insisting the trilateral AUKUS security pact must align with its "America First" priorities.

The UK has awarded Rolls-Royce a £9 billion ($11 billion) contract to design, manufacture, and provide support services for nuclear reactors that power its fleet of submarines.

Australia announced plans to invest billions over the next two decades to expand a shipyard in Western Australia, which will serve as the maintenance hub for its nuclear-powered AUKUS submarine fleet, News.Az reports citing foreign media.

The UK, US, and Australia have reaffirmed their commitment to military and security cooperation, particularly in the Indo-Pacific region, during a key meeting in London.