United Kingdom Defence Industry Faces A Transgressional Stalemate.

London; March 2026: The United Kingdom’s defence industrial base is struggling with unclear priorities, capability gaps and a lack of government direction, according to MPs and peers, who warn that delays to key funding plans are holding back both industry and national security objectives. In its latest report, the Joint Committee on the National Security Strategy (NSS) says industry still does not have a clear signal on how defence spending will be allocated, with the long-promised Defence Investment Plan yet to be published.

Evidence to the committee suggests the UK retains strength in assembling final systems, but lacks depth in key components and supply chains. One contractor described a situation where “good capacity for assembly” exists, but “immediate component production capacity” is missing, pointing to structural weaknesses beneath the surface.

Those weaknesses are already being felt operationally. Former programme leads highlighted how difficult it has been to source critical inputs such as propulsion systems, motors and computing hardware from sovereign or secure supply chains, particularly in fast-moving areas like uncrewed systems.

Despite repeated commitments to “rebuild” the defence industrial base, industry groups say the absence of the Defence Investment Plan means firms still do not know where to invest. Without clarity on funding allocations, companies are unable to align research and development with government priorities, especially in areas linked to sovereign capability.

That uncertainty is particularly acute for smaller firms. SMEs are seen as central to innovation, yet the report suggests they face structural barriers to scaling up, leaving them exposed to foreign acquisition. One witness noted that while the UK is effective at creating start-ups, companies often struggle to grow beyond that stage, limiting their contribution to defence capability.

Industry bodies including ADS and techUK warned that this lack of direction is already affecting investment decisions. There are also concerns about how much of the burden for resilience spending will fall on private companies, with tensions emerging between commercial viability and national security requirements.

Ministers have acknowledged delays. The Government says it is “working flat out” to complete the Defence Investment Plan, although it has also indicated it will not rush publication. Officials argue the delay reflects a wider effort to reassess spending and ensure the UK is prepared for higher readiness demands.

The committee, however, is clear in its conclusion. It says industry “lacks an adequate signal” from government, and that this is undermining efforts to prioritise critical technologies and build long-term capability. For SMEs in particular, the absence of support risks weakening the UK’s ability to retain homegrown expertise.

The Government has failed to clearly define what it means by ‘sovereign capabilities’ or to set out which technologies it intends to prioritise, according to a parliamentary committee, raising concerns about how industry and defence planning can align with national security goals. In a detailed section of its report on the National Security Strategy, the Joint Committee says there is “no agreed, written definition” of sovereignty across government, despite the concept sitting at the centre of plans to strengthen the UK’s security and industrial base.

While sovereignty is broadly understood as the ability to “autonomously develop, sustain and control critical technologies”, the committee found that, in practice, there is little clarity about what this actually means for policy. Industry groups warned that it remains unclear which capabilities the UK intends to fully own, and where it will continue to rely on international partnerships.

Ministers themselves appear to acknowledge the limits. Evidence to the committee suggested that full “end-to-end” sovereignty is “realistically near impossible”, with the focus instead on controlling key parts of the value chain where the UK has strength. The report goes further, warning that this lack of definition is already having practical consequences. It says uncertainty is complicating research, development and investment decisions, particularly in fast-moving areas such as artificial intelligence, where the UK is seen as having a strong skills base but no clear strategic direction.

MPs and peers also highlight the need to be more selective after witnesses argued that the government should be willing to “pick winners” and concentrate effort on areas of genuine advantage, rather than attempting to maintain broad but shallow capability across too many sectors.

A range of priority areas is identified, including the nuclear deterrent, AI and autonomous systems, drones, munitions, communications networks and energy supply, alongside underpinning industries such as steel. However, the committee says there is still no clear statement from the government on which of these will be treated as core sovereign capabilities, or to what degree.

There are also warnings about skills. Evidence suggests the UK does not currently have a clear understanding of where critical shortages lie, with one witness cautioning that the “erosion in the underlying skills base is slow but ultimately more dangerous than crisis shocks”.

The committee concludes that while the strategy recognises the importance of sovereignty, it stops short of providing the detail needed to make it actionable. It states plainly that there is “no clear definition” and “no sufficient indication” of which technologies will be prioritised. It recommends that the Government set out a formal definition of sovereign capabilities, including different levels of sovereignty, and clearly identify which technologies it intends to develop and protect.

Team Maverick.