Tident has a cost of more than fifty billion, knowing government, it will be about three times whatever the estimate is. Isn't the point of NATO that the US has the world's most advanced stockpile of nuclear weapons even though Russia has the largest in sheer quantity? Maybe don't bother with Trident just yet. Consider other things like homelessness, education, housing, healthcare, and basic economic reordering. You can, and UK does, almost, meet the 2% NATO requirement without overhauling an entire nuclear weapons program. It's a complete waste of money for starters because the only scenario in which you can use them involves being nationally obliterated.
They've shelved HS2 which costs roughly what Trident does (at the start, but as per usual, see Track and Trace, we expect a doubling in the actual cost relative to stated, such is the conveyor belt of "feeding" which goes on in public/private transactions: delays are profitable if you aren't in it for the project but have a percentage in the design and aren't liable for the deadline: not all delays, some companies, penalized, clauses, but others, governments have, worldwide, built things and completely rebuilt them half-way through blaming one private company, taxpayer money, and hiring another, taxpayer money: sociologically, it becomes a farce). Anyway, nuclear weapons for an "everyone is dead if we use them" scenario, or highspeed rail, perhaps even a decent rocket/space program, which ticks defense and private industry feeding into superstructural areas of chips, computation, and fusion moving forward. I know where I put my money seeing as 50 billion spent in Scotland (an island off it, pick one) for a UK Space Program, sats, etc., is Union campaign for a Labour government (or even a Tory government) which thus replaces the North Sea Oil issue (as the Scot/Eng divide).
I'll say it again: track and trace cost more than the purchase of Twitter. What did it do again? Where is it now? How is it even possible that government gets away with what is cleary corruption at that scale. An app, just an application, costing more than one of the world's largest user-based social media applications, entirely. And it didn't work, then it did sort of work, and then it just disappeared. Go figure.