DSEI is always vast, but this year the scale felt even greater. The long walks between halls were a reminder of both the physical size of the event and the sheer breadth of the sector it represents. Yet beyond the steps and conversations with partners and customers, the deeper impression was clear: Defence is only growing in importance, and the role of digital transformation, sovereign capability and partnerships is becoming sharper by the year.
Securing advantage
The strategic backdrop has shifted since 2023. A new government, the UK Strategic Defence Review 2025 and renewed commitments to higher defence spending have reframed the conversation. The threat environment remains intense, and with it comes an emphasis on capability. Across the floor there was strong recognition that data sovereignty, secure supply chains and control of national decision-making tools are now non-negotiable. SMEs in particular are beginning to see their role in this space taken more seriously, trusted to deliver critical elements of larger programmes at pace and to the highest standards.
Driving advantage
The partnerships on display reflected a different energy from previous years. Rather than simply marketing the latest platform, many exhibitors sought to demonstrate collaboration. The creation of a dedicated tech zone was a welcome sight and underlined the growing centrality of digital innovation to defence advantage. Interoperability and the re-use of existing capabilities were recurring themes. Defence ambitions such as the UK’s Digital Targeting Web depend on this approach: faster decision-making will not come from moving data around more quickly alone, but from intelligence that informs commanders at the right moment, in the right way.
Maintaining advantage
The conversations around maintaining advantage revealed the sector’s paradox. Defence investment is rising yet the frustration is familiar: digital transformation has been promised for over two decades, yet procurement bottlenecks and skills shortages continue to slow progress. The industry is ready to step forward, but unless digital becomes business-as-usual rather than an aspiration, the risk is that the UK will struggle to keep pace.
Looking ahead
If there was one overriding takeaway from DSEI 2025, it was that defence is absolutely a growth industry. Shown very clearly in the increasing size of the event itself, resulting in our teams truly getting their steps in whilst they were there to cover it all. In addition, the rise of SMEs, the appetite for partnerships and the visibility of sovereign capability are positive signals. Yet the challenge is to turn ambition into action, ensuring that digital advantage is delivered alongside traditional capabilities. That is how the UK will secure, drive and maintain its advantage in the years ahead.
