The UK will formally recognise Palestine as a state, it is understood.
Sir Keir Starmer is expected to make the announcement on Sunday after he said in July that the government would make the move unless Israel met certain conditions.
The prime minister had called on Benjamin Netanyahu's government to take substantive steps to end the "appalling situation in Gaza", agree to a ceasefire, commit to a long-term sustainable peace, allow the UN to restart the supply of aid, and not annex the West Bank.
The Israeli foreign ministry furiously rejected his statement, with Mr Netanyahu claiming that "Starmer rewards Hamas 's monstrous terrorism and punishes its victims".
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