Foreign Secretary David Cameron has called for "a sustainable ceasefire, leading to a sustainable peace" in Gaza and warned that "too many civilians have been killed".
The comments, in a joint letter with German counterpart Annalena Baerbock, went further than previous UK calls for a humanitarian pause.
It comes after the White House expressed unease about the failure of Benjamin Netanyahu’s administration to reduce civilian casualties and its plans for the future of Gaza.
Writing in the Sunday Times, Lord Cameron said: “Our goal cannot simply be an end to fighting today. It must be peace lasting for days, years, generations. We therefore support a ceasefire, but only if it is sustainable.”
But both Lord Cameron and his German counterpart stopped short of calling for an immediate ceasefire, something that has been a recurring demand by pro-Palestinian campaigners as the death count in Gaza continues to grow.
“We know many in the region and beyond have been calling for an immediate ceasefire,” the article said. “We recognise what motivates these heartfelt calls.
“It is an understandable reaction to such intense suffering, and we share the view that this conflict cannot drag on and on. That is why we supported the recent humanitarian pauses.”
The offensive, triggered by the unprecedented October 7 Hamas attack on Israel, has flattened much of northern Gaza and driven 85% of Gaza’s population of 2.3 million from their homes.
Displaced people have squeezed into shelters mainly in the south in a spiralling humanitarian crisis.
Israel will not win this war if its operations destroy the prospect of peaceful co-existence with Palestinians
In a warning to Israel, the two foreign ministers said: “Israel has the right to defend itself but, in doing so, it must abide by international humanitarian law.
“Israel will not win this war if its operations destroy the prospect of peaceful co-existence with Palestinians. They have a right to eliminate the threat posed by Hamas.
“But too many civilians have been killed. The Israeli government should do more to discriminate sufficiently between terrorists and civilians, ensuring its campaign targets Hamas leaders and operatives.”
The shift in language by the UK Government comes as Mr Netanyahu faces public anger after it emerged that the three hostages who were mistakenly shot by Israeli troops in the Gaza Strip had been waving a white flag and were shirtless when they were killed.
In a nationwide address on Saturday, the Israeli primer minister said the killings “broke my heart, broke the entire nation’s heart,” but he indicated no change in the country’s military campaign.
“We are as committed as ever to continue until the end, until we dismantle Hamas, until we return all our hostages,” he said.
