Strategic Defence Review 2025

Baroness Miller of Chilthorne Domer Excerpts

Friday 18th July 2025 Lords Chamber

[Baroness Miller of Chilthorne Domer (LD)]

My Lords, I recognise the much more dangerous and difficult world outlined by the noble Lord, Lord Robertson, which is particularly difficult at a time when the nuclear non-proliferation treaty is at its weakest. Will the Minister say exactly what the Government are going to do at next year’s non-proliferation treaty review conference to reinvigorate the treaty? As the noble Lord, Lord Bates, pointed out, as one of the P5, we are in a particularly good position to do that.

The relevance of this question was underlined last week by an event at the Royal Society that marked 70 years since the Russell-Einstein manifesto mentioned by my noble friend, Lord Alderdice. The manifesto says:

 “We have found that the men who know most are the most gloomy”.


One of the men in this House who knows the most about nuclear non-proliferation is the noble Lord, Lord Browne of Ladyton. I am certainly not saying that he is gloomy, but his address at the Royal Society reflected the progress that can be made on non-proliferation, given the leadership and political will. The UK was energising and leading the non-proliferation agenda in the late 2000s and achieved some material advances on verification. I thought the noble Lord, Lord Bates, came out with a very good question when he asked the Minister whether he will consider using all the expertise and experience of the noble Lord, Lord Browne, to address the very real issues that the NPT faces next year.

We also have a particular responsibility to do that not only as one of the P5, but because in this strategic defence review we have changed our posture on nuclear weapons and they are playing a more important role for us. The Government are thinking of reintroducing an air-launched nuclear capability. At the same time, however, the UK seems to be burying its head in the sand about the effects of nuclear war, and I do not think that is helpful. The UK was one of only three countries in November last year to vote against creating a UN scientific panel on the effects of nuclear war. It was said that the scientific study

“will deliver a stronger evidence base that will inform the world and contribute to constructive dialogue with a view to convergence in work on nuclear disarmament and arms control”.

That is exactly what we need.

The noble Lord, Lord Howell, pointed out powerfully in his speech the current dangers of nuclear non-proliferation. There are states with nuclear weapons with which we trade that do not belong to the nuclear non-proliferation treaty. There are now deep divisions in the world between the nuclear weapons states and other countries, and the other countries have felt deep frustration at the failure to progress the nuclear non-proliferation treaty. That has led them to create the United Nations Treaty on the Prohibition of Nuclear Weapons, which has been signed by 94 countries and ratified by 73.

The last Government refused to engage with the ban treaty. I ask the Minister whether this Government will heed the wise words of your Lordships’ committee on international relations in its report, Rising Nuclear Risk, Disarmament and the Nuclear Non-Proliferation Treaty, which said that

“the dissatisfaction of the Ban Treaty’s proponents with the status quo on disarmament should be taken seriously. We therefore recommend that the Government should adopt a less aggressive tone about this treaty and seek opportunities to work with its supporters towards the aims of Article 6 of the Nuclear Non-Proliferation Treaty”.

What does failure look like? Well, of course, it looks absolutely terrifying. In a recent book on nuclear warfare, Annie Jacobson, who interviewed 47 of the US top brass for her conclusion, discovered that if, at minute nought, North Korea launched a weapon, by minute 92 the northern hemisphere would be a wasteland and the rest of the world would be facing a slow death. We need the NPT to succeed.