The UK is cautioning Israel against using the plan to move ahead with extending Israeli sovereignty to parts of the West Bank.

“Any such unilateral moves would be damaging to renewed efforts to re-start peace negotiations, and contrary to international law,” said UK Foreign Secretary Dominic Raab.

“Any changes to the status quo cannot be taken forward without an agreement negotiated by the parties themselves,” he added.

The U.S. is recognizing Israel’s right to sovereignty over areas that would include most existing Israeli communities in the West Bank. However, Washington seemed to be acting to slow the process envisioned by Israel’s Prime Minister Benjamin Netanyahu.

Trump announced the details of the plan together with Netanyahu at the White House. The prime minister immediately announced that he would bring the issue of sovereignty to the Israeli cabinet for approval at its Sunday meeting.

Jared Kushner, the president’s son-in-law and senior adviser said to have been the main force in formulating the plan, hurried to comment that the Israeli government would not be acting that swiftly on the issue.