Should the UK stop working with the US on the replacement of Trident in favour of a European joint venture?
DefenceEnded 6 Sept

Should the UK stop working with the US on the replacement of Trident in favour of a European joint venture?

Yes 45%No 55%597 votes cast

The UK is replacing its Vanguard-class submarines with Dreadnought-class vessels to maintain continuous at-sea deterrence, leasing US Trident II D5 missiles and collaborating on warhead and propulsion technology under the 1958 Mutual Defence Agreement. In 2026 the government committed £15 billion to the sovereign Astraea warhead programme while retaining Trident compatibility. Amid US political uncertainty, Germany is in talks to fund aspects of the UK deterrent and France has advanced a forward deterrence initiative inviting European participation in exercises and planning.

Jump to opinions· 34

A European joint venture was defeated less by affection for Washington than by fear of throwing a working nuclear programme into the long grass. No prevailed with 327 votes against 270, a clear decision but hardly a blank cheque for the existing arrangement.

The winning side’s strongest case was practical and institutional. The floor’s most-respected No argument put it bluntly: “America makes the best weapons, Europe makes the best bureaucracy,” while another called the partnership “a working partnership, not a crush”; others stressed sunk costs, submarine design and the lead times needed to preserve continuous at-sea deterrence.

Yes voters were arguing about something more fundamental than procurement. Its most-respected voice said, “We just can’t trust them,” while another warned that “Betting Britain’s ultimate security on who happens to win the White House is madness”; the case was that sovereignty cannot rest on American elections, particularly when the current programme is built around US technology.

That is where the two sides talked past each other. Yes treated political reliability as the central engineering constraint; No treated engineering, schedules and the durability of the 1958 partnership as the central political facts. Even among No voters, the status quo was not universally embraced: some wanted a longer-term European role, others an independent arsenal, and one dryly asked, “Why can’t we do both?”

The verdict therefore settles the immediate choice while leaving the strategic anxiety intact. This was a vote for continuity under suspicion, not continuity without conditions.

“With the current US administrations clear links to Russia Europe's biggest threat, openly threatening allies, bullying allies economically, threading land grabs and fundamentally no longer a reliable Nato ally, This won't change with future administrations as the damage is done. We just can't trust them to thebe a reliable ally with our Nuclear Deterrent. We must look to our European allies to hel”

YES case · BriskGavel30 · 4 respects

“America makes the best weapons, Europe makes the best bureaucracy. I know which one I'd feel safer protecting us.”

NO case · Jonathan · 5 respects

55%
No
majority
45% Yes
Votes597
Skipped17
You—

% voting yes, by leaning

97% yes among H. Left voters, 32 of them
91% yes among Left voters, 79 of them
85% yes among C. Left voters, 68 of them
69% yes among Centre voters, 58 of them
44% yes among C. Right voters, 73 of them
16% yes among Right voters, 223 of them
3% yes among H. Right voters, 71 of them
H. Left
Left
C. Left
Centre
C. Right
Right
H. Right
Cite this result

refnation referendum, closed 6 September 2026: “Should the UK stop working with the US on the replacement of Trident in favour of a European joint venture?” — No 55% (597 votes).

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Debate

34 Opinions

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Jonathan· 613
The Frugal Constabulary
Voted noH. Right lean

America makes the best weapons, Europe makes the best bureaucracy. I know which one I'd feel safer protecting us.

BriskGavel30· 559★
The Even-Keeled Realist
Voted yesCentre lean

With the current US administrations clear links to Russia Europe's biggest threat, openly threatening allies, bullying allies economically, threading land grabs and fundamentally no longer a reliable Nato ally, This won't change with future administrations as the damage is done. We just can't trust them to thebe a reliable ally with our Nuclear Deterrent. We must look to our European allies to help fund and support the deterrent as the US moves away from Europe going forward.

Bigden40· 626
The Unifier
Voted noRight lean

No, the track record of European joint ventures is woeful and the only other nuclear power in Europe is France.

Slawomir· 981
The Property-and-Custom Right
Voted noRight lean

Replacing one deal with another, even worse? No, thank you. Ideally, we would work paralel on independent solution.

atc1249· 736
The Ledger-Keeper of the Realm
Voted noCentre lean

A close relationship with the USA has been an anchor to keep them in NATO however that relationship is currently being solely tested. The UK missile subs are designed around the Trident II making a swap difficult and cost.y. If UK intends to retain 1st strike nuclear capability it makes sense that to consider a delivery mechanism that is not solely dependent on the whim of an increasingly erratic USA.

JohnnyBoy· 575
The Freeholder Insurgent
Voted noRight lean

An inane idea. Ideally we would do it on our own like we used to, as US is not a benign friend. They sell us helicopters without software, tanks that don’t work etc and expect us to pay top $ everytime. US defence industry is highly corrupt; but cooperation with the Europeans is a political & financial nightmare, particularly the French. Malign EU is of major concern as they will elbow their way in to secure some kind of veto over its use in its desperation for Sovereignty.

The Fiscal Custodian
Voted noRight lean

This is gesture politics. Nuclear programmes are long term decisions, more important than Trump.

DanielW· 461
The Unyielding Conservative Steward
Voted noRight lean

Ideally, we should be able to do this by ourselves. But if we can't we should be partnering with our ally with the strongest defence industry in the world.

The Fiscal Plain-Speaker
Voted noRight lean

This project is already underway. I would not rule out partnering with France in a future project (and I think we should talk more) but the lead times required would make a change now wholly unrealistic if we are to attempt to stay on schedule The USA is acting irrationally at present, but it will not always do so.

The Hayekian Constitutionalist
Voted noRight lean

Prime Ministers and Presidents come and go, our Alliance is with the American people and the security partnership has remained strong since the 1958 Act saved Britains nuclear deterrent after our failure to develop nuclear propulsion, ballistic missiles, and a viable nuclear deterrent as a permanent security council member. It ain’t broke and doesn’t need fixing.