In 2010 the UK Government stated an intent to reduce the nation’s overall nuclear warhead stockpile ceiling from not more than 225 to not more than 180 by the mid-2020s.
However, in recognition of the evolving security environment, including the developing range of technological and doctrinal threats, this is no longer possible, and in a 2021 review it was announced that the UK would move to an overall nuclear weapon stockpile of no more than 260 warheads.
To ensure that the deterrent is not vulnerable to pre-emptive action by potential adversaries, at least one of the Royal Navy’s four missile submarines will always be on a Continuous At Sea Deterrent patrol.
The UK’s nuclear weapons are operationally independent and only the Prime Minister can authorise their use. This ensures that political control is maintained at all times. The use of nuclear weapons would only be considered in extreme circumstances of self-defence, including the defence of NATO Allies.
NATO recognises that any employment of nuclear weapons against NATO would fundamentally alter the nature of a conflict. Therefore, as long as nuclear weapons exist, NATO will remain a nuclear alliance.
Main image: Petty Officer 1st Class Ronald G | Credit: Commander, Submarine Group Nine