In June 2025, the British Government announced plans to purchase twelve new F-35A fighter jets and equip them with American tactical nuclear weapons. This reignited an old debate: is participating in NATO’s nuclear mission with US controlled nuclear weapons enough, or should the UK rebuild its own sovereign tactical nuclear capability?
Resolution Tempered With Restraint: Lessons From The Cancelled WE-177 Replacement Programme, analyses a classified Cold War tactical nuclear weapons programme to draw lessons as to the feasibility of the UK developing such a capability today. The report finds that even at the height of the Cold War, successive governments concluded that developing new tactical nuclear weapons capability was unaffordable given other defence priorities, and the limited capacity of the UK’s nuclear weapon design and production capacity.
It concludes that any attempt to rebuild a distinct sovereign UK tactical nuclear capability would have to overcome the same obstacles that defeated the WE-177 replacement programme and given today’s weaker force structure and AWE’s current commitment to a new Trident warhead, a new tactical nuclear capability would probably be unaffordable without a substantial rise in defence spending and a significant expansion of the UK’s nuclear infrastructure and industrial base.
In a Foreword to the report, Professor Sir David Omand, the former Director of GCHQ, writes that the report, “illustrates exactly the factors policymakers will need to consider should the British Government conclude that a requirement exists to reacquire a separate, distinct, sovereign UK sub-strategic nuclear weapons capability.”
The report’s author, Dr James Jinks, writes that:, ‘While much has changed since the end of the Cold War, perhaps the enduring lesson from the cancelled programme is that the fundamental problem which has troubled British nuclear policy since the dawn of the nuclear age remains: It is not a question of what the Government would like to do, but what it can afford to do given the strategic environment it now faces.’
