That's probably one of very few options available quickly.
UK could launch it's nuclear program, it has the scientific background and infrastructure, but surely they wouldn't have a certified, tested weapon within 5 years.
Maybe UK could buy them from France - but I don't think France ever exported their nukes, and if they would even consider it. How would it be launched? They have air-launched missiles, presumably only working with French jets, and cruise missiles, which IIRC are not very long range.
Who else is there? India? Pakistan? Israel? North Korea? Hard to imagine a sale from either of these countries.
Why does the UK need an option available quickly?
I think it does not and this is just pandering to the US.
> UK could launch it's nuclear program, it has the scientific background and infrastructure, but surely they wouldn't have a certified, tested weapon within 5 years.
As in the other thread (that I see you've now seen) the UK does have an active nuclear weapons program, with an in-progress updated design. It's true that it would need a smaller 'tactical' warhead design for the use-case we're talking about so it would take some time.
> How would it be launched?
I have no idea, we have certainly reached beyond my competence to hold an opinion here :)
It just feels like an odd choice at the current time, to crow about a new capability, but reveal another country is going to hold the keys. especially when the UK does have an active nuclear program. :shrug: