British Prime Minister Andy Burnham and U.S. President Donald Trump met for the first time in person on Tuesday at the United Nations General Assembly, trading warm language on trade, migration and energy before splitting sharply over the Chagos Islands. Trump told reporters the UK’s plan to cede sovereignty to Mauritius while leasing back Diego Garcia is “terrible,” even as Burnham nodded when asked whether he would revisit the paused agreement.
Warm optics, hard base politics
Trump said UK-U.S. relations are “more up” under Burnham than under Keir Starmer, calling the new prime minister a “natural businessperson” they had spoken with “numerous times” by phone before New York. The Guardian reported the two covered Rolls-Royce supply chains, immigration enforcement and Iran-related fuel prices in a joint appearance after their bilateral.
That cordial frame cracked when journalists turned to Diego Garcia, the Indian Ocean airfield the United States and United Kingdom operate for long-range bomber and submarine support missions. Trump stressed the base is “strategically very important,” especially for U.S. operations tied to the Iran war, and repeated his opposition to London paying Mauritius roughly £101 million annually to lease back territory Britain once held outright.
Where the deal stands
London and Port Louis negotiated the handover under Starmer, but Trump withdrew U.S. support in April, pausing ratification indefinitely. Burnham told the BBC he spoke with Mauritian Prime Minister Navin Ramgoolam before flying to New York and remains “determined to secure the long-term operation of the base,” language that leaves room to renegotiate terms without abandoning Mauritian sovereignty claims.
When a reporter asked whether Burnham would look again at the pact, Trump answered “I think the prime minister is going to be looking at [the deal],” and Burnham replied simply, “Yep.” Reform UK leader Nigel Farage posted on social media that the arrangement is “dead,” reflecting domestic pressure on Burnham’s fragile coalition.
Parallel security commitments
The Chagos dispute unfolded the same day Burnham confirmed Britain will deploy an RAF Voyager tanker to refuel Saudi jets defending against Houthi missile and drone attacks—a time-limited mission Burnham framed as protecting oil routes and British household energy bills. Trump’s praise for Burnham therefore sits beside a public split over basing rights that NATO planners treat as distinct from Gulf refueling tasks.
What London must weigh
Downing Street needs U.S. consent to keep Diego Garcia viable; Mauritius needs recognition; and Burnham needs to show voters he can manage Trump without surrendering Atlantic alliance architecture. Labour backbenchers who opposed Starmer’s payout model will watch whether Burnham seeks a cheaper lease or a sovereignty fudge that keeps Mauritian flags while guaranteeing U.S. access for decades.
Tuesday’s meeting advanced personal rapport but did not resolve the base lease math. Until Washington re-engages on Chagos, Burnham’s “Yep” is a promise to reopen talks, not a finished compromise—and Trump’s “terrible” verdict remains on the record for any renegotiation table.
