The Global Combat Air Programme (GCAP) is a major international defence initiative bringing together the United Kingdom, Italy and Japan to develop a next-generation combat air system. Announced in 2022, the programme aims to deliver a new fighter aircraft by 2035, replacing existing platforms such as the Eurofighter Typhoon and Japan's Mitsubishi F-2.

At its core, GCAP is designed to ensure that partner nations maintain a cutting-edge combat air capability in an increasingly complex global security environment. As threats evolve, modern air forces require more advanced, connected and adaptable systems. GCAP brings together the military, industrial and technological strengths of all three nations to meet this challenge, while also strengthening long-term defence cooperation.

How is GCAP changing the way combat air capability is delivered?

Unlike previous fighter programmes, GCAP is not just focused on a single aircraft. It is being developed as a "system of systems", meaning the aircraft will operate as part of a wider, integrated network across air, land, sea, space and cyber domains.

This reflects a broader shift in defence towards multi-domain operations, where success depends on the ability to share data, coordinate assets and respond quickly to changing conditions. The aircraft is expected to incorporate advanced technologies such as artificial intelligence, secure data networks and next-generation sensors, enabling faster decision-making and improved situational awareness.

In practical terms, GCAP is about creating a more connected and adaptable approach to air power, rather than simply developing a more advanced jet.

What are the strategic and industrial implications of GCAP?

A defining feature of GCAP is its international collaboration model. By working together, the UK, Italy and Japan can share expertise, costs and risk, while benefiting from a broader industrial base that includes major defence organisations, SMEs and research institutions. This approach supports faster innovation while ensuring each nation retains critical industrial capability.

Beyond defence, GCAP is expected to deliver significant economic and industrial benefits. The GCAP supply chain activity will supports the creation of high-value jobs, develop skills across populations, drive investment in advanced technologies and help sustain long-term capability within the aerospace and defence sector.

The programme also plays an important geopolitical role, strengthening relationships between Europe and the Indo-Pacific and enhancing interoperability between partner nations. At the same time, it reinforces national sovereignty by enabling countries to design and develop their own defence capabilities.

A growing alliance: what GCAP expansion could mean

Recent developments suggest GCAP could expand beyond its founding UK, Italy and Japan partnership, with Italy signalling openness to additional members including Canada, Germany and Saudi Arabia. Early indications suggest Canada may participate initially as an observer, while broader participation is being considered as a way to strengthen the programme's industrial base and strategic reach.

Potential expansion reflects a wider shift in global defence collaboration, with countries reassessing alliances amid uncertainty in rival programmes such as Future Combat Air System (FCAS). Bringing in additional partners could help distribute development costs, accelerate innovation and reinforce supply chain resilience, further positioning GCAP as a leading international platform for next-generation combat air capability.

What does GCAP mean for the future of global defence?

Looking ahead, GCAP is expected to enter service from around 2035, with a lifespan that will extend for decades. As global security challenges continue to evolve, the programme is intended to provide a long-term foundation for combat air capability, supporting both national defence and international collaboration.

Ultimately, this is more than a fighter jet programme. It represents a long-term strategic investment in defence capability, industrial strength, upskilling the workforce and of course, technological innovation, helping to shape the future of combat air and the wider defence landscape.

With programmes like GCAP driving innovation across the aerospace and defence sector, organisations will need to be agile and adapt to an evolving landscape at pace. Given the scale of the GCAP supply chain opportunity, it presents an opportunity for companies to pivot into defence.

To discuss what this means in practice, please contact Elizabeth Williams from our Aviation, Aerospace and Defence team.