Thank you for contacting me about the Treaty on the Prohibition of Nuclear Weapons.
I understand that nuclear weapons are a highly emotive topic which attract a significant amount of attention. While I am aware the Government does not intend to sign, ratify or become party to the treaty prohibiting nuclear weapons, I do want to reassure you that the UK is committed to the Treaty on the Non-Proliferation of Nuclear Weapons (NPT).
I firmly believe that the best way to achieve a world without nuclear weapons is through gradual multilateral disarmament, negotiated using a step-by-step approach, provided for under the NPT. The Treaty on the Prohibition of Nuclear Weapons would threaten this ambition by comprehensively prohibiting participation in development, testing, production, acquisition, possession and storage of nuclear weapons. Given the unpredictable security environment we face, such a move would undoubtedly threaten our national security, and the collective security of our NATO allies.
The NPT, on the other hand, puts in place the structures to further the goal of a world without nuclear weapons. Over the last 50 years, it has minimised the proliferation of nuclear weapons, provided the framework to enable significant levels of nuclear disarmament and allowed states to develop secure and safe, peaceful uses of nuclear energy. It has also played a crucial role in providing the basis for discussions with Iran and DPRK.
I do want to stress that the Government has made significant progress in nuclear disarmament. The UK is the only country to have reduced its deterrent capability to a single nuclear weapon system and has reduced the requirement for its operationally available warheads.
Thank you again for taking the time to contact me.