Challenger1978 said:
Gelsons Dad said:
this is quite some way wide of the truth.
So what is the truth ?
The subs are ours. The Trident missiles are designed and built in the US, but the UK has access to a pool of missiles and leases those it requires to outfit our boats. So while we don't 'own' individual missiles, we have title to a total number required (58). The warheads are designed, built and maintained in the UK. Undoubtedly they share a common heritage with US weapons (we have cooperated with the US on nuclear weapons since the 1958 US–UK Mutual Defence Agreement) but are different to the US Trident warheads - the UK Trident can carry up to 12 warheads, the US up to 8. The UK warheads are thus smaller, lighter and less powerful than the US equivalent. The UK has its own command and control system to transmit launch orders to the boat, totally independent of the US.
Bear in mind that our nuclear weapons are also committed to NATO, although any decision to use them in support of NATO is entirely at the discretion of the British Prime Minister - no Turkish general can fire our nuclear weapons!
As to whether we need them or not, that entirely depends on whether you buy in to the concept of nuclear deterrence. The Royal Navy has kept at least one ballistic missile submarine on patrol continuously since 1968, and any adversary has had to consider that were they to attack the UK with nuclear weapons the UK would have the capability to respond and render unacceptable damage to that adversary. That is the essence of deterrence.
Whether you think it's likely, or why we are more likely to face nuclear attack than other developed nations who don't have nuclear weapons (Germany, or Japan, for instance) - ah, well that's a different question entirely...