Can we rely on US nuclear umbrella?  The UK nuclear weapons programme was first created in late 1945 a time when people were concerned about the US commitment to Europe which was uncertain as the rise of the Iron Curtain had not been yet apparent. Currently if we didn't replace trident and disarmed more likely than not we would fall under the American strategic nuclear umbrella which would be fair enough in the short term and medium term as the relationship is currently strong despite certain cobblestones. A similar thing also applies with the French  But can we really rely on the Americans to keep that umbrella extended over the long term when their interests and emphasis may shift, regardless of cultural or ideological links? Relying on someone else’s deterrent will always be risky as the US or France would not want to put themselves at risk of being attacked in order to deter an attack on us. [1] An independent deterrence arsenal is necessary to maintain deterrence.  [1] The Secretary of State for Defence and The Secretary of State for Foreign and Commonwealth Affairs, ‘The Future of the United Kingdom’s Nuclear Deterrent’, Ministry of Defence, December 2006, p.18.