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UK Defence Investment Plan boosts Global Combat Air Programme and unmanned systems, trims older fleets
The UK Ministry of Defence unveils an £8.6 billion commitment to next-gen combat aircraft and expands drone projects while retiring legacy helicopters and ISR platforms.
The gist
UK Defence Investment Plan injects £8.6bn into future combat air projects, boosts unmanned systems, and phases out older helicopters and ISR aircraft.
The UK Ministry of Defence (MoD) has released its long-awaited Defence Investment Plan (DIP) on June 30, 2026, outlining a mixture of enhanced funding commitments to next-generation combat aircraft initiatives alongside the retirement of legacy platforms. This publication follows months of delay owing to funding debates, and presents an updated strategic pathway for British military aviation through to 2035 and beyond.
Central to the announcement is an £8.6 billion allocation over four years dedicated to the Global Combat Air Programme (GCAP). This multinational initiative, partnering the UK with Italy and Japan, aims to deliver a sixth-generation fighter aircraft for operational service by the mid-2030s. The DIP confirms that a forthcoming international contract will sustain investment in research, design, and technology development to realize this advanced capability.
Alongside GCAP, the UK plans to acquire a new tranche of Lockheed Martin F-35 fighter jets. The order is split between 15 F-35B variants, which support short takeoff and vertical landing operations currently operated by the RAF and Royal Navy, and 12 F-35A conventional takeoff and landing variants slated to enter early 2030s service. The F-35A fleet will restore the UK's ability to carry nuclear armaments as part of NATO's dual-capable aircraft mission, reasserting a strategic nuclear commitment.
The plan also allocates £1.1 billion to sustain and upgrade the RAF's Eurofighter Typhoon fleet, securing the type's operational availability into the 2040s. This supports the UK’s air and missile defence capabilities and bolsters the aerospace industry, including export and employment benefits. The DIP specifies involvement in the Typhoon's Long Term Evolution programme vital for NATO's control of airspace.
A notable emphasis is placed on uncrewed and autonomous combat aircraft development, with £300 million earmarked for demonstrating a UK Collaborative Combat Aircraft (CCA) capability before 2030. These autonomous platforms are envisioned to enhance sensor reach, carry additional missiles, and operate ahead of manned fighters to improve survivability and lethality. They will leverage a sovereign propulsion system and are expected to integrate into future integrated air and missile defence (IAMD) roles.
Investment also includes £240 million toward hybrid carrier air wing concepts, exploring the integration of jet-powered drones alongside the existing F-35B fleet under projects named Pantheon and Vanquish. Furthermore, £360 million is designated for overhauling the jet training system to support both domestic and international pilot development, maintaining a significant UK industrial role.
Despite these modernization efforts, the DIP details several platform retirements. Early phased retirement of Leonardo Wildcat battlefield reconnaissance helicopters will commence in 2027 to facilitate procurement of new Boeing CH-47F Chinooks and Leonardo AW149 helicopters. The oldest Chinooks will also be retired as they reach maintenance milestones. Additionally, the RAF's Raytheon UK Shadow R1 intelligence, surveillance, and reconnaissance aircraft are slated for retirement following cancellation of a King Air 350CER upgrade program.
The DIP totals military spending commitment to £298 billion by the end of the decade, reflecting a recent £15 billion uplift. Annual expenditure is set to grow from £74 billion in 2027 to £80 billion by 2029, approaching 2.7% of the UK’s GDP—a rise from current levels, with plans to reach 3% during the next parliamentary term. This increased fiscal envelope underpins the UK's strategic intent to modernize and maintain competitive defense capabilities.
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