A parliamentary inquiry launched by a former Australian minister is casting a shadow over the Aukus security pact, the landmark trilateral agreement between Australia, the UK, and the US. The inquiry, led by former defence minister Joel Fitzgibbon, is examining the costs, timelines, and strategic implications of the nuclear-powered submarine programme, which has been hailed as the cornerstone of Western deterrence in the Indo-Pacific. But Fitzgibbon’s intervention has sparked concerns that the fragile political consensus underpinning the deal could fracture, leaving Britain’s own submarine-building ambitions in jeopardy.
The Aukus pact, announced in 2021, marked a historic shift in Australia’s defence posture, with Canberra opting to acquire nuclear-powered submarines—a capability it has never possessed—through a multibillion-dollar partnership. The UK’s role is pivotal: Barrow-in-Furness shipyard will build the new SSN-Aukus class, a fusion of British and American design, with the first vessel expected in the late 2030s. For Whitehall, the programme is not just about alliance solidarity but also about sustaining sovereign submarine-building capability, a rare industrial asset.
Fitzgibbon, however, is known for his blunt assessments. His inquiry has already heard testimony questioning the affordability of the programme, with estimates suggesting Australia’s bill could exceed A$100 billion. Critics argue that the money could be better spent on other capabilities, such as long-range missiles or cyber defences. Fitzgibbon himself has warned that the Aukus submarine project may become "a classic case of strategic overreach"—a phrase that resonates deeply in a nation still haunted by past procurement disasters like the Collins-class submarines.
The political timing could not be worse. The UK’s own defence budget is under strain, with the Royal Navy’s surface fleet shrinking and the Integrated Review refresh prioritising technology over mass. If Australia’s commitment wavers, the business case for Barrow-in-Furness collapses. The UK would lose not just a key export opportunity but also the economies of scale that make building nuclear submarines viable. Without Australian orders, the SSN-Aukus programme could slip into a cost spiral, delaying the replacement of the Vanguard-class submarines and creating a capability gap that adversaries would exploit.
Beyond industrial anxieties, the inquiry touches on a deeper trust deficit. The Aukus deal was a diplomatic bombshell, triggering a furious response from France, which lost a conventional submarine contract worth billions. The inquiry risks reopening those wounds, as French officials have been keen to underline the deal’s fragility. More worryingly, any sign of Australian backsliding would be seized upon by Beijing as proof that Western alliances are brittle and the Indo-Pacific’s strategic order is shifting.
Yet the inquiry is not necessarily a death knell. Fitzgibbon may simply be performing oversight, ensuring democratic accountability for a massive public investment. His final report could refine the programme, making it more efficient. But the optics are troubling. Aukus was meant to demonstrate resolve, not second-guessing. The UK government must now deploy its diplomatic weight to reassure Canberra, even as domestic pressures mount. For Prime Minister Rishi Sunak, the message must be clear: the Aukus submarine pact is not a luxury but a necessity—and its success depends on unwavering political will from all three nations, not least the one that started the inquiry.
