Downing Street sources say agreement is ‘done deal’ and will not be scuppered by US president’s U-turn

US intelligence agencies disagree with Donald Trump’s newly found opposition to the Chagos deal, Keir Starmer has said, as he underlined how the US administration had supported the deal as it bolstered their defences.

The prime minister made his remarks, which could undermine the US president’s fresh view of the deal as an “act of great stupidity”, on the flight to Beijing for a visit that will cover UK national security among other issues.