UK to Acquire F-35A Jets, Revives Airborne Nuclear Deterrent Role

Post by : Amit

Photo: Reuters 

June 25, 2025 | London — In a significant shift in the United Kingdom’s defense posture, the Ministry of Defence (MoD) has announced plans to acquire at least a dozen Lockheed Martin F-35A Lightning II aircraft, aiming to reinstate the Royal Air Force’s nuclear strike capability — a role it last held nearly three decades ago. The move, confirmed through recent NATO briefings and defense officials, positions Britain to rejoin a key element of NATO’s collective nuclear deterrence strategy.

Unlike the F-35B variant, which is already in service with the UK and optimized for carrier operations with vertical landing capabilities, the F-35A is the only variant currently certified to carry the US-made B61-12 nuclear gravity bomb. With this purchase, Britain takes a decisive step toward rejoining NATO’s Dual-Capable Aircraft (DCA) program, which allows select allied nations to deliver US nuclear weapons in wartime scenarios under joint operational planning.

The UK last maintained an airborne nuclear strike capability in the 1990s, when the Panavia Tornado GR1 carried WE.177 tactical nuclear bombs under NATO command. That era ended when the UK opted to centralize its deterrent entirely at sea, relying solely on the Trident-armed Vanguard-class submarines under the Continuous At-Sea Deterrent (CASD) doctrine. Since then, Britain has championed a minimal, submarine-only nuclear posture.

However, rising geopolitical tensions — most notably Russia's increasingly aggressive nuclear signaling and the unraveling of key arms control treaties such as the INF Treaty and New START — have prompted a reassessment across NATO. The UK’s return to a dual-capable aircraft fleet is both a signal of strategic resolve and a contribution to NATO’s goal of enhancing deterrence in the European theater.
“This is about restoring flexibility to the UK’s nuclear posture and showing commitment to NATO burden-sharing,” said a senior British defense official. “In a more dangerous world, adaptability and options are vital”
 

The F-35A — a conventional takeoff and landing (CTOL) variant of Lockheed Martin’s fifth-generation stealth fighter — is the backbone of the US Air Force and multiple NATO allies. Unlike the STOVL F-35B variant operated from the UK’s aircraft carriers, the F-35A is the only model that has completed nuclear certification testing with the B61-12 guided bomb, a precision nuclear weapon with variable yield and low collateral damage.

The B61-12, developed by the United States as part of its tactical nuclear modernization program, is set to replace older Cold War-era nuclear bombs stationed in Europe. It is designed for penetration missions using high accuracy and low observable (stealth) platforms — making the F-35A the ideal delivery system.
“The F-35A’s stealth, range, and nuclear certification make it uniquely suited to operate in contested environments,” noted military aviation expert Douglas Barron. “This gives the UK a truly survivable second-strike option if ever needed — all under NATO command.”

The UK’s entry into the NATO nuclear-sharing club would mirror arrangements currently held by countries like Germany, Italy, Belgium, and the Netherlands, which operate US-supplied nuclear bombs under dual-key systems. While the UK has always maintained operational control over its own nuclear weapons, under this arrangement, it would deliver US-owned B61-12s — stored at NATO bases — in extreme wartime contingencies.

Analysts see the move as a blend of deterrence and diplomacy: a clear message to adversaries that NATO's collective deterrent remains robust, while also offering reassurance to allies who worry about gaps in capability as older systems retire.

Although official basing plans have yet to be announced, several sites are under consideration. RAF Lakenheath, already hosting two USAF F-35A squadrons and nuclear infrastructure, is a logical contender. Alternatively, RAF Marham — currently home to the UK’s F-35B fleet — could be adapted, though it lacks the hardened nuclear storage and certified infrastructure presently required for such a mission.

The 12 F-35As would likely be integrated into a dedicated RAF squadron trained under NATO nuclear standards. Pilots would undergo specialized training, and the aircraft would be fitted with software and hardware modifications necessary for nuclear strike missions — including dual-key release protocols that ensure joint UK-US control.

This acquisition is just one piece of a larger puzzle. The UK is also modernizing its submarine-based deterrent with the Dreadnought-class SSBNs, investing in Tempest, a sixth-generation fighter aircraft under the Global Combat Air Programme (GCAP), and enhancing its space and cyber defense capabilities.

Yet, this is the first time since the Cold War that the UK has explicitly rebuilt a tactical nuclear strike platform. While critics argue that this move could further destabilize arms control efforts, supporters say it is a necessary hedge against growing threats.

Procurement is expected to begin within the next two years, with delivery possibly by 2028–2030, depending on factory production slots and modification timelines. The UK will also need to work closely with the US and NATO on certification, training, and the integration of operational planning.

Though small in number, these F-35As represent a monumental shift in UK strategic thinking. Not since the height of the Cold War has the RAF prepared to carry out a nuclear strike mission — and that makes this decision one of the most consequential in recent British defense history.

UK, F-35A Jets