US leaders have urged Keir Starmer not to recognise a Palestinian state over fears the 'deeply troubling' move could reward Hamas.

The prime minister announced plans to legitimise a state in July, saying he would do so during the UN General Assembly meeting in September if Israel did not take 'substantive steps' towards peace in Gaza.

Congressional Republican officials have sent a letter to the UK, France, Canada, Australia and other key allies, calling on them to oppose Starmer's efforts, as he is expected to announce the UK's formal recognition as early as Sunday.

'This is a reckless policy that undermines prospects for peace,' wrote chairwoman Elise Stefanik and Senator Rick Scott.

'It sets the dangerous precedent that violence, not diplomacy, is the most expedient means for terrorist groups like Hamas to achieve their political aims.'