Downing Street said Prime Minister Keir Starmer spoke on 28 December with United States President Donald Trump, Ukraine’s President Volodymyr Zelenskyy and European leaders. The official readout, published on 29 December, said the call focused on securing a “just and lasting peace” in Ukraine.
The leaders commended President Trump for progress to date, underlined the need for robust security guarantees, and stressed the urgency of ending the war. The Prime Minister reiterated that the UK will work closely with partners to sustain momentum in the coming days.
In UK policy terms, “security guarantees” draw on the G7 Joint Declaration agreed in July 2023 and the UK‑Ukraine Security Co‑operation Agreement signed in January 2024. Together they set out long‑term military assistance, training, defence industrial co‑operation, intelligence and cyber support, and economic resilience measures alongside Ukrainian reform commitments.
Delivery has accelerated through 2025. The government’s factsheet records an expected £4.5 billion for Ukraine this year, including £600 million for air‑defence capabilities and large‑scale drone procurement and training. The Ministry of Defence has also detailed rapid deliveries of air‑defence missiles, artillery ammunition and counter‑drone systems via UK‑led funds and bilateral packages.
On 16 January, the Prime Minister signed a long‑term UK–Ukraine “100‑year” partnership in Kyiv covering defence, maritime security and technology co‑operation, complementing the 2024 security agreement. Kyiv’s account and contemporaneous reporting describe the pact as intended to sustain support over the long run.
Financing channels are being used to underpin these commitments. On 14 April, HM Treasury confirmed a second £752 million disbursement to Ukraine under the G7 Extraordinary Revenue Acceleration Loans scheme, part of a wider $50 billion initiative, with funds directed to air defence and other urgent needs.
The Downing Street readout provides no detail on negotiating parameters or sequencing. Its focus on maintaining momentum in the coming days points to further allied co‑ordination rather than a single breakthrough; signals to watch include additional bilateral commitments under the G7 framework, fresh air‑defence announcements, and further loan tranches.