F10: The UK’s Nuclear Deterrent

Policy motion

Submitted by: 12 Members.
Mover: Jamie Stone MP (Spokesperson for Defence).
Summation: Richard Foord MP.


Conference reaffirms:

  1. The universal liberal values of internationalism, human rights, the pursuit of peace, and the rule of law.
  2. The duty of the United Kingdom to keep its people safe.
  3. Our long-held desire to negotiate towards a world where nuclear weapons are put beyond use.
  4. Our belief that the United Kingdom is safer and more prosperous when working with multilateral institutions, including NATO.
  5. The United Kingdom's long-standing legal and moral obligations to pursue global disarmament.

Conference notes:

  1. Our 2017 policy paper on nuclear weapons, Towards a World Free of Nuclear Weapons, which recommended a change in the UK's nuclear posture from Continuous At-Sea Deterrent (CASD) to a medium-responsiveness posture with no continuous deployment.
  2. That the global security environment is characterised by increasing instability, including the fragmentation of nuclear arms control agreements, and has deteriorated following Russia's full-scale invasion of Ukraine in February 2022.
  3. Russia's veiled threats as to its readiness to use nuclear weapons, on the battlefield or elsewhere.
  4. That the UK's nuclear weapons are declared for the defence of NATO and so play a key protective role for our allies.

Conference believes that:

  1. Vladimir Putin's Russia poses a clear threat to our national security and that of our NATO allies.
  2. We have no wish to see the current conflict in Ukraine escalate, yet in these circumstances NATO must retain all the necessary elements of a credible nuclear deterrent.
  3. Abandoning the current posture of continuous at-sea deterrence (CASD) would send the wrong signal to Vladimir Putin and our European allies about our willingness to come to their defence, and weaken the credibility of the UK's nuclear deterrent.
  4. Taking a step down the nuclear ladder at a moment when it is so unlikely to be reciprocated will sadly do nothing to further our ambition of global disarmament.
  5. The challenging security environment and rising nuclear risks should embolden the UK to make a renewed push for global disarmament, and while the strategic context is challenging, opportunities which arise in the future must not be squandered.
  6. The UK Government's approach to global disarmament has been at best counter-productive and at worst in breach of legal and moral obligations.

Conference therefore calls on the UK Government to:

  1. Maintain a minimum, credible nuclear deterrent.
  2. Maintain the current posture of continuous at-sea deterrence.
  3. Retain the option of a future move down from continuous at-sea deterrence to a medium-responsiveness posture as a credible step to demonstrate leadership on nuclear disarmament, if and when the strategic environment is more conducive to progress.
  4. Take a decision on whether the UK requires a fourth Dreadnought-class submarine on the basis of a full assessment of the strategic environment at the time, before major fabrication begins.

Conference urges the UK Government to pursue global disarmament, including by:

  1. Reversing plans to increase the cap on the stockpile of nuclear weapons; and associated reductions in transparency commitments.
  2. Publicly recommitting to the UK's obligations under the Non-Proliferation Treaty.
  3. Making global disarmament a diplomatic priority for the Foreign, Commonwealth and Development Office.
  4. Looking to engage further with non-Nuclear Weapon States on disarmament initiatives, including the Stockholm Initiative and the Treaty on the Prohibition of Nuclear Weapons (while acknowledging that the UK cannot sign that Treaty).

Given the unlikelihood of disarmament developments with Russia under the present Russian Government, Conference believes that the UK Government should also explore opportunities to pursue disarmament initiatives with other Nuclear Weapon States, including:

  1. Engaging with other Nuclear Weapon States regarding bilateral adoption of transparency measures.
  2. Continuing engagement with Nuclear Weapon States which are yet to sign the Fissile Material Cut-Off Treaty, which Russia has already signed.
  3. Encouraging remaining countries which have not ratified the Comprehensive Nuclear-Test Ban Treaty, which Russia has already ratified, to do so.

Applicability: Federal.

Mover: 7 minutes; summation of motion and movers and summation of any amendments: 4 minutes; all other speakers: 3 minutes. For eligibility and procedure for speaking in this debate, see page 9 of the agenda.

The deadline for amendments to this motion, see page 12 of the agenda, and for requests for separate votes, see pages 8-9 of the agenda, is 13.00 Monday 5 September. Those selected for debate will be printed in Conference Extra and Saturday's Conference Daily.

In addition to speeches from the platform, voting members will be able to make concise (maximum one minute) interventions from the floor during the debate on the motion. See pages 8 and 10 of the agenda