Australia never intended to make the submarines with 100% indigenous tech and 100% indigenous sourced components. We don't have the industry for that. Currently collaboration with the UK seems straight forward and easy. The risk with the UK is cost and time. Fairly normal project risks.Err, let's not get into a competition as to how "up to the task" either country is. Remember, Australia needs the UK to make the reactors, which is a big part of the project. It's easy for someone to be chuffed about their contribution to a BBQ if they're just setting up the table, whilst someone else is manning the grill.
Well I don't think it is. We are still getting 3 American submarines there is an option for 2 more on top of that. Australia has invested billions into US submarine production and industry. $5billion. Australia Steps Up: Strengthening the U.S. Industrial Base However, the current administration doesn't make that a interesting option at the moment, but that is a 24 month situation, it will be reassessed going forward.The USN have their own issues so the UK-OZ boat is Australia’s only option, additional Virginia boats beyond what have been promised is unlikely.
AUKUS is a three nation collaboration. US is still pretty involved in the nuclear technology material stuff with all three partners.
AUKUS – Understanding the Uranium Connection
SYNOPSIS AUKUS brings together Australia, the UK and the US in a pact widely perceived as a response to perceptions of a Chinese threat. Less well known is the fact that Australia’s uranium reserves are needed to secure longer-term American strategic advantage globally and to help underpin the...
The UK is still reliant on the US to enriched uranium for submarines and weapons. Australia isn't allowed to enrich its own uranium while the NPT is important. But these are pretty far off problems. Australia has 3 nuclear submarines before fuelling for the 4 and more becomes a problem.
Australia and the UK have the know how to do enrichment, we just don't currently do it because of treaties, economics etc. Spinning up a new laser enrichment plant based off latest technology is fairly straight forward for both countries.
Australia has huge reserves of uranium and is supplying the US programs with it. So Australia has leverage. US not delivering on Australia's paid for enrichment would mean the US cutting off its uranium supply into those programs.
AUKUS is three close friends cupping each others testicles. Tearing it apart would be, foolish. Its has its own trust but verify systems in place. Perhaps impossible. Its why I don't see anyone, Canada, Japan etc being an equal partner in that relationship. Even the US would find it extremely painful to kill that program. It has been set up, by the Americans, that way. Of the three partners, the least encumbered is Australia, it would just cost money and a type of submarine they don't currently operate.