How Keir Starmer’s aid cuts threaten Britain’s climate mission

By Karl Mathiesen, Abby Wallace | 03/06/2025 06:21 AM EST

The Labour government has promised to lead the world on climate change, but its renewed focus on defense has thrown those plans into uncertainty.

A protester holds up placards in Westminster.

The U.K. government is unable to say what impact recent cuts would have on international climate finance. Susannah Ireland/AFP via Getty Images

LONDON — Keir Starmer’s decision to underwrite a major new defense commitment by slashing overseas aid spending was supposed to signal the British prime minister’s seriousness about global security.

But along the way it has provoked a ministerial resignation, an internal party row — and left those in charge of the country’s ambitious international climate policies wondering if they, too, have been hobbled.

The cut, expected to take more than £6 billion a year from the aid budget from 2027, was announced by Prime Minister Keir Starmer at the end of last month.

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A full week on, the government is unable to say what impact the cut would have on international climate finance — a key plank of U.K. green diplomacy through which money is invested in poorer countries to help them build cleaner energy systems or protect against the effects of climate change.

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