We have had numerous equipment gaps - MR, and now AWACS. I cant see Boris and Liz stopping a gap, to give one to the ausies.The Royal Navy didn't have enough when it had all the Swiftsures and Trafalgars let alone the numbers it has today.If an Australian order for an Astute jumped ahead of the Brit order, it wouldn't change how many in-service boats would be in the theatre -- right ? I mean, the boats that Britain is building now are destined for the Pacific -- right?
Currently we have two old Trafalgars, three Astutes and one working up.
Talent will decommission in 2022 and Triumph in 2024, by 2024 we should still have five SSNs with the two newest Astutes joining the fleet with two more completing before 2030.
That's a small fleet for so much ocean to cover - up the Barents Sea, down to the Falklands, one in the Indian Ocean, one nearer home for training and keeping watch on Trident rotations out of Faslane and at least one in the dock. The fleet must be spread pretty thin and it only takes a breakdown or minor mishap and there is nothing to fill the gap.
I can't see the MoD letting numbers fall below seven. Maybe BAE Systems is going deliberately slower - let's face it 30 years to build seven SSNs is lethargic - and HMS Astute is already 11 years old, so by 2041 should be due replacement by SSN(R) No.1 and the youngest wouldn't need replacing until 2056-60, so I can't see the build rate needing to increase drastically.
For me the RAN is doing the right thing if they can lease some USN subs, at least they might have something relatively young that could be spared (and even the USN hasn't got much spare fat these days). But if they do that and get used to operating US submarines and reactors and getting expertise in US systems its unlikely they will want to switch to British reactors and systems. SSN(R) vs SSN(X) is a tantalising contest. I'm not sure BAE Systems would relish having to design a bespoke hull around a US powerplant and that means giving quite intimate details of reactors etc. that could get to potential competitors (RR).
Here's another idea, what about a genuine 'standard' boat, made in 2 sizes, one for uk and Aus, and one for the USN......
Plan the production, plan the people to rotate around the world, so you have constant builds.....