It’s a long time coming, but the publication of the Defence Investment Plan does actually mark an important moment for British defence. For the first time in decades, investment is beginning to reflect the realities of modern warfare. Artificial intelligence, autonomous systems, long-range precision fires, digital command networks and software-defined capability all feature prominently. The language of the Defence Investment Plan is recognisably the language of twenty-first century conflict, and that represents a welcome departure from the Cold War and beyond era in which military advantage was measured primarily by ships, planes and tanks. Ukraine has demonstrated that mass still matters, but increasingly it is intelligent, connected and adaptable mass that delivers operational advantage. The Government deserves credit for recognising that reality.
However, there is an important distinction between recognising the nature of future warfare and building the institutions capable of delivering it. The Defence Investment Plan sets out what Britain intends to buy, but it says comparatively little about how Britain intends to buy it. That distinction is more than procedural. It goes to the heart of whether the United Kingdom can generate military capability at the pace demanded by an increasingly contested world.
For decades, defence procurement has been organised around individual programmes. Each develops its own requirements, technology stack and delivery timetable before eventually producing a platform that enters service years after the original requirement was identified. That approach was broadly appropriate when technological change occurred over decades. It is far less suited to an environment in which software evolves continuously, autonomous systems improve between operational deployments and artificial intelligence capabilities advance faster than conventional procurement cycles can accommodate. The challenge facing British defence is therefore no longer simply one of funding. It is one of adaptation.
This is where the Defence Investment Plan is at its strongest, but also, frustratingly, where it remains incomplete. The Strategic Defence Review rightly argued for a more integrated force built around digital networks, data and autonomy rather than isolated platforms. The Defence Investment Plan reinforces that direction through significant investment in autonomous systems, digital integration and advanced technologies. Initiatives such as Commercial X, Taskforce Kindred and wider procurement reform suggest that the Ministry of Defence increasingly understands the need to work more effectively with innovative suppliers and shorten the route from development to deployment.
The critical question, however, is whether these initiatives become the new operating model or remain exceptions within a procurement system that is still fundamentally organised around large, infrequent acquisition programmes. If Britain is serious about maintaining technological advantage, defence acquisition must evolve from purchasing platforms towards generating mission capability. Open architectures should become the default rather than the exception, allowing sensors, effectors, autonomous systems and software to evolve independently while remaining interoperable within a common mission framework. Software upgrades should become routine rather than programme-defining events, and payloads should be capable of integration across multiple platforms rather than being tied to individual vehicles.
This shift is about far more than technology. It also requires a different relationship between government and industry. Large prime contractors will continue to play an indispensable role in delivering complex sovereign capabilities, but many of the technologies now changing warfare most rapidly are emerging from specialist SMEs. Artificial intelligence, robotics, autonomy, advanced sensing and mission software increasingly develop through iterative innovation rather than decade-long development programmes. The strategic challenge is therefore not whether British companies can innovate. It is whether Defence can adopt their innovations quickly enough to maintain operational advantage.
The prolonged uncertainty surrounding publication of the Defence Investment Plan illustrates the wider point. While the industry has broadly welcomed the clarity that the Plan has eventually provided, many smaller companies delayed investment decisions, recruitment and product development while awaiting direction from government. Capability delayed is not simply capability denied to the Armed Forces; it also risks weakening the industrial ecosystem upon which future capability depends.
The Defence Investment Plan should therefore be viewed not as the culmination of defence reform, but as the foundation upon which genuine procurement transformation can now be built. The Strategic Defence Review defined the future force. The Defence Investment Plan begins to resource it. The next stage must ensure that the institutions responsible for acquisition are capable of delivering capability at the speed with which modern conflict evolves.
Ultimately, the success of the Defence Investment Plan will not be judged by the scale of the investment announced, important though that is. It will be judged by whether Britain can move from identifying emerging technologies to fielding operational capability more quickly than our adversaries. In an era defined by rapid technological change, speed of adaptation is becoming as important as the capabilities themselves. If the Defence Investment Plan succeeds in accelerating that transition, it will prove to be a genuinely historic document. If it does not, Britain risks investing in tomorrow’s capabilities through yesterday’s processes.
Ben Everitt is a former MP, Graduate of The Royal College of Defence Studies and founder of Stratonex Defence Technologies
