The UK’s early leverage within the F-35 programme has diminished as different patrons outpace Britain on fleet dimension and use, witnesses advised the Home of Lords Worldwide Relations and Defence Committee throughout a 28 October session on the UK’s future relationship with the USA.
The listening to featured Dr Sophy Antrobus of the Royal Aeronautical Society and King’s School London, and Dr Justin Bronk of the Royal United Companies Institute.
Dr Antrobus stated the UK’s distinctive tier-one standing utilized solely to the now-completed growth section. “We’re equal companions now within the manufacturing and in-service phases,” she famous, whereas stressing that the early buy-in nonetheless carries weight. The UK embedded experience early and right now “15% of F-35 plane are produced on this nation,” she stated, citing Nationwide Audit Workplace figures that estimate £22 billion in industrial advantages in opposition to £11 billion in Ministry of Defence spending. She added that inside Joint Program Workplace governance the UK stays the primary non-US voice in companion voting sequences.
On accountability for value and schedule, Antrobus pointed to US oversight challenges. “In 2024 not one of the plane had been delivered on time. The common delay was 238 days,” she stated, referencing a US Authorities Accountability Workplace report. “The US authorities has issue holding this system to account. The UK goes to be no extra influential than them in that case.” She argued the UK’s 38 Ministry of Defence personnel embedded within the Joint Program Workplace are its handiest lever of affect.
Bronk backed the view that early UK standing conferred entry, however stated Britain’s sensible standing has eroded relative to companions that purchased extra jets and fly them more durable. “Our participation in loads of sensible areas has fallen considerably in need of the place our preliminary program commitments had been,” he stated.
He contrasted the UK’s roughly 40 plane in service and decrease flying charges with Australia’s 72 F-35s and better sortie technology, including that Tokyo and a number of other European companions additionally now subject bigger fleets.
Even so, Bronk highlighted a delicate space the place the UK retains privileged entry alongside the USA and Australia. By means of the Australian Canadian UK Reprogramming Lab, London can construct bespoke mission knowledge masses and digital warfare recordsdata to a level not accessible to most different companions.
“There’s very vital differentiation in among the most delicate areas of the weapon system,” he stated, whereas cautioning that Australia is “more and more considerably competing with the UK for many most well-liked companion spot” given Indo-Pacific priorities and operational tempo.

