Goodness me. You are throwing everything into the pot here. What does Chagos and foreign aide have to do with defence.
Quote " Why not have an adequate deterrent like we had a few decades ago.".
We do. It is called Trident, and we done the deal to buy it years ago. Or lease it more like. Because we share the missile pool with the US, We do our own warheads and subs. And we are pretty good at the subs. The warheads are ours, made in Aldemaston and Burghfield.
So yes, we actually have the exact same deterrance as we had decades ago. Unless you are going back to the V bomber fleet. And who retired the V bombers and bought Trident.... that was Thatcher. That's how far back Trident goes. And it still costs us billions to pay towards upgrades to Trident, to keep it in service to 2060 or so. 820 billion GBP expected cost as at 2023 ( That includes the subs etc).
Re subs. We have a steady state stream of making them in Cumbria. And to try to help with the cost, there is likes of the AKUS deal. That goes back to Sunak . These things take decades.
And did you miss the news last week that the UK has 3 of it's 4 ballistic subs at sea ?
By the way, the last few times we test launched Trident, they failed. But that is not as bad as it sounds, because of the priciples of MAD. Only one, or a few, needs to work, for MAD to stand.
Also a point worth noting. Germany are looking at maybe doing a share of cost deal with the UK or France on nukes. Because of Trump not being stable. Link for that below. MAD principles at work again.
Germany won’t build nukes but could flash French, UK weapons to deter foes, Merz says - Defense News
Don't you read the defense news to keep up to date with all this stuff ? Or are you hankering after the glory days of the UK Vulcan fleet. Is that what Farage is saying ? Bring back the Vulcan, best of British.