April 11 (UPI) — After an about-face by the Trump administration, Britain said it is pausing a plan to transfer ownership of the Chagos Islands to Mauritius because it cannot complete the deal without U.S. support.

Britain on Friday said it is abandoning a deal to return sovereignty to the islands, which would have permitted the both countries to continue using the military base in Deigo Garcia they have operated since the 1970s, because there is not enough time for the U.K.’s parliament to pass a legislation on it, The Guardian reported.

The islands have been controlled by Britain since the 1800s, though in 1968 it granted independence to Maritius — which it also had controlled — but kept possession of the Chagos Islands.

President Donald Trump had in 2024 offered support for Britain to return the islands in return for continued use of the base, which includes billions in annual payments for doing so.

Trump withdrew his support for the deal earlier this year, calling it a “great act of stupidity,” less than a year after Secretary of State Marco Rubio and the Trump administration called the deal an “historic” achievement, at least partially because it kept the Diego Garcia base in use.

The change in opinion came, however, weeks before the United States and Israel started the war in Iran at the end of February because, he said at the time, the U.S. military may need to use the Diego Garcia base, The Hill reported.

“The U.K. had two objectives, one was to comply with international law, the second was to reinforce the relationship with the United States,” Simon McDonald, a former permanent secretary in Britain’s Foreign Office.

“When the president of the United States is openly hostile, the government has to rethink, so this agreement, this treaty, will go into the deep freeze for the time being,” McDonald said.

The deal to return the islands to Maritius stems from an overall effort by Britain to reckon with its colonialist history, as well as a 2019 international court decision that said it had acted illegally by separating the Chagos from Maritius in the 1960s.

The military base on Diego Garcia, which dates to a 1966 treaty between Britain and the United States — which the two countries cleared people living in the area from in order to construct it — was to give the two nations a 99-year lease to continue operating the base.

While the Trump initially supported the deal, it has long been controversial in Britain, with Kemi Badenoch, leader of Britain’s Conservative Party, said it took too long for the current U.K. government to give up on it.

Badenoch said the government had dragged its feet on dropping the deal, calling it a “damning indictment of a prime minister, who fought to hand over British sovereign territory and pay $47 million to use a crucial military base which was already ours.”