Germany’s Entry Into GCAP Could Delay UK's Fighter Program by Years

Giving Germany a full partnership in Britain’s next-generation Tempest fighter program could add years to development and jeopardize its 2035 delivery goal, senior industry figures have warned.

The concerns center on how much responsibility Berlin would demand for designing and producing the aircraft.

Joining as a customer would carry different implications from securing a substantial industrial role, sources said.

One senior figure estimated that full German participation could push progress back by at least “one to two years”.

The warnings follow bilateral discussions this week in which Andy Burnham indicated that the U.K. was willing to explore German involvement in the program with Italy and Japan.

Industrial Role Drives Delay Concerns

Germany’s potential contribution remains undefined. Military and diplomatic sources said it was unclear what arrangement Berlin might pursue, although its industrial weight has encouraged expectations that it would seek more than purchasing rights.

That distinction could determine whether expansion helps spread the program’s costs or forces changes that disrupt delivery.

The Global Combat Air Program, known as GCAP, combines the three partners’ next-generation fighter efforts under a treaty established three years ago.

Its costs are expected to reach tens of billions of pounds.

The planned supersonic stealth aircraft would coordinate drones, missiles, communications and intelligence capabilities as part of a broader combat system.

Lorenzo Mariani, head of Italian defense group Leonardo, welcomed interest from prospective partners at the opening of a new program facility in Turin on Friday.

However, he emphasized that expansion must remain subordinate to the schedule.

“But our priority is to stay on time for this program. This is a fundamental point.”

Japan Faces a Replacement Deadline

The timetable matters especially to Tokyo, whose F-2 fighters are due to begin retiring in 2035.

Japan is understood to be especially concerned about timely delivery, with China’s increasingly confrontational behavior adding to its security concerns.

Hikariko Ono, Japan’s ambassador to Italy, used the Turin event to emphasize that the new capability must arrive when the participating countries need it to protect security in Europe and the Indo-Pacific.

Her remarks underscored the pressure on the partners to weigh additional participation against existing operational requirements.

Expansion Requires Joint Agreement

British diplomatic sources described Burnham’s remarks as consistent with the U.K.’s existing willingness to consider new partners.

They characterized the discussions as an invitation to examine possible arrangements.

Australia and Saudi Arabia are also reportedly holding exploratory talks.

Canada recently obtained observer status, which insiders said gives it access to sensitive information before it decides whether to pursue deeper involvement.

Germany, meanwhile, has reportedly examined a separate fighter initiative with Spain and Sweden.

POLITICO reported that Berlin considers GCAP less aligned with its continental requirements.

Marco Zoff, chief executive of Edgewing, the company responsible for delivering GCAP, said additional countries could still join.

However, decisions would require compromises on industrial allocation, technology, and where work takes place.

“Every decision has a trade-off. Not necessarily a trade-off in delays.”

The U.K. Ministry of Defense reiterated that the partners remained open to expansion while prioritizing rapid delivery.

Any decision on additional participants would require agreement among Britain, Italy and Japan.