UK defence AI with the US and Ukraine: what has been announced, and what happens next

In the past four weeks the UK government has announced work on a defence AI partnership with the US, opened a competition giving UK companies access to Ukraine's battlefield data, and had its Defence Secretary, Wes Streeting, pitch closer UK–US defence-technology work in Washington on 15 October. This explainer sets out what the government's own documents say about each, and what is scheduled next.

The UK–US "AI and Autonomy partnership"

Prime Minister Andy Burnham announced it at the UN General Assembly on 22 September. His speech, which GOV.UK publishes as a transcript "exactly as it was delivered", gives it one sentence: "I am announcing today that we are developing a new AI defence partnership with the US to protect our critical national infrastructure."

A Downing Street release issued earlier that day adds a little more. It said the Prime Minister "will announce the launch of work between the UK and US on a new AI and Autonomy partnership", and that it "will see the UK’s Ministry of Defence Rapid AI Delivery Taskforce and the US’s Department of War Chief Digital and Artificial Intelligence Office work together on artificial intelligence and autonomy". The stated aim is "accelerating the delivery of trusted, interoperable capabilities", with the release naming critical national infrastructure "from sea lanes to air space" as the focus.

A GOV.UK search for "AI and Autonomy" found no other document on this partnership: the only results published since 22 September are this release and the 25 September one, which repeats part of its wording. The government's readout of the Prime Minister's meeting with President Trump that day does not mention AI. None of the UK documents we read gives a budget, a timetable or named projects. On our reading, both the speech ("developing") and the release ("launch of work") describe a partnership still being set up. We have only seen the UK government's account.

The same release said the UK and US had fired a heavyweight torpedo, jointly developed by the US and Australia, from Excalibur, a 12-metre uncrewed undersea vessel built in Plymouth, as part of AUKUS. It says this was "the first time either country had launched a torpedo from an undersea uncrewed vessel, rather than a crewed submarine".

The Ukraine data competition

The UK–Ukraine AI Partnership came first. A joint declaration signed in Kyiv on 24 August says it "reflects our shared political intent and does not create legally binding obligations" and will proceed "on a pilot-first basis". We covered it at the time in a piece arguing the pact is really a deal for battlefield data.

On 25 September the MOD opened the first competition under that partnership, run by its Rapid AI Delivery Taskforce (TF RAID). According to the competition document, up to 12 UK-registered companies will get access to Ukraine's Avengers Labs platform "via a non-financial contract" for a three-month period, bearing their own costs, and the document says "Ukraine shall own the trained AI model weights". Up to five may then win "funded MOD contracts" from early 2027. Our 27 September report covers the terms in detail.

The 25 September release describes drone swarms that use AI to "identify threats and targets and reach decisions, always with appropriate human involvement". That last phrase is the MOD's; it does not define it.

What Streeting said in Washington

Speaking at the Center for Strategic and International Studies on 15 October (GOV.UK again marks the text "exactly as it was delivered"), Streeting said: "If we pool our resources, we can lead the development of defence technologies in drones, uncrewed vessels at sea, advanced fighter jets and the use of AI."

On Ukraine's platform, which he called "Avengers Lab", he said: "The UK now has access to this data goldmine." He added that "universities, researchers, and tech firms are using it to co-develop battle-winning AI capabilities in response". The speech does not name who those users are. The government's 24 August release said pilot projects had been rolled out with three British start-ups (Sintela, Mind Foundry and Skyral), and described one, a fibre-optic sensing project, as using Ukrainian data; the competition document says access for the companies it selects runs from about mid-to-late November.

The speech does not refer to the AI and Autonomy partnership by name.

What happens next

• Thursday 22 October, 23:59 BST: the Avengers competition closes, according to the competition document.
• 23–30 October: MOD review of bids and due diligence.
• By 6 November: selected companies notified (the document's own timeline says the week commencing 2 November).
• About November 2026 to February 2027: Phase 1 access to Avengers Labs. The document gives this as "approximately late November 2026 to late February 2027" in one place and "(Approx) mid November 2026 – mid February 2027" in another.
• Early 2027: Phase 2 funded contracts for up to five companies. No sum is stated.
• UK–Ukraine: the August declaration says "Further arrangements will be brought forward within the next few months".
• UK–US: no next step or date has been published in the documents we read.

Why it matters

On our reading, the Ukraine strand now has published terms, dates and an ownership rule for model weights, while the US strand so far consists of one sentence in a speech and a few paragraphs in a press release, which name the two offices involved. Anyone assessing the UK's defence AI plans has a competition document to scrutinise for the Ukraine strand and very little yet for the US one.