Having our own industries capable of building weapons is pointless if we don't have a secure supply line for crucial components such as semiconductors.
Back in 2022 there was a national initiative called "semiconductor moonshot" aimed at building a domestic semiconductor manufacturing capability.
How much progress has been made? Not sure. Problem is we are building from a very low base.
If we follow the crawl, walk, run methodology, we are still in the crawl stage. Basic missile assembly is the starting point (crawl), with two platforms being NSM and GMLRS. The good news with these two is that they should in time provide a subcontracting base that can reasonably quickly support other missile types. The bad news is this take a while to fully establish.
Electronics I suspect will be the run phase, and the last to successfully accomplish.
I think the other important consideration is to rationalise the different missiles we use and then use these in as many systems as possible. Nothing is harder to manage than an excessive number of bespoke missile types, all only used in single applications.
PrSM, GMLRS and NSM/JSM will become our mainstay mass used strike weapons, all to be made in country under current plans. Use them across all three forces. Make heaps. Supplemented with LRASM/JASSM and Tomahawk for specific uses.
We use both the AIM120 and ESSM and they form the bread and butter defensive missiles for all three forces. We should have our own production line for these, and enhance it to produce the AMRAAM-ER for NASAMS (it is after all only a love child of the other two). A deal with Raytheon seems to be taking forever, despite them being appointed as a key GWEO partner. I still see this as the missing component to our long term strategy. We should have endless warehouses full of these missiles. These three missile types would keep our aircraft in the sky, ships at sea and NASAMS functional come what may.
For the upper end capability, we have gone all in on the SM2 and SM6 for the Navy. I will go out on a limb and say we should consider the SM6 as our medium range air defence missile for land establishments. Use the Typhoon launching system, link it to the NASAMS fire control system for an integrated short/medium package. It simplifies inventory. The SM6 is a better missile than the patriot and stunner. It can be used as a long range missile for the airforce as well, so again can support all three forces.
If we are all in with the SM2/6 then the SM3 seems the logical step for high end balistic missile defence. The new block 2A has far better range than THAAD and ARROW 3. Its unfortunately only made in small numbers, but again a long term major order commitment from the US would stimulate increased production. Or alternatively partner with Japan in a new production line (they have been communicating this desire for a while). Again the SM3 can utilise the Typhoon for land based systems, so taps into (potentially) existing equipment.
Imagine a NASAMS/Typhoon package with AIM120 and AMRAAM-ER for close in and cruise missiles, combined with SM6 and SM3 for balistic missiles. It would integrate very well with our Navy and Airforce with a shared inventory.