A House of Lords committee advising the Government on foreign policy has blamed the stalled peace process on the “politics and policies of Israel” and told ministers not to go along with Donald Trump’s “peace-negating” approach to the conflict.

In a report published this week, called ‘The Middle East: Time for New Realism,’ peers warned that the new U.S. president “mercurial and unpredictable nature” of policy-making should not affect the UK’s position.

Members of House of Lords International Relations Committee (IRC) wrote: “The politics and policies of Israel diminish the possibilities of peace, specifically the rapid expansion of settlements.”

They said that settlement-expansion was due to the policies of Israeli Prime Minister Benjamin Netanyahu, and noted a new bill in February to “allow the expropriation of privately owned Palestinian land”.

Noting Trump’s promise to relocate the U.S. embassy to Jerusalem, and his choice of a pro-settlement ambassador, they warned of diverging UK-US interests, since Trump had now abandoned the long-standing commitment to a two-state solution.

The report, published on Tuesday, said “the U.S. president has taken positions that are unconstructive and could even escalate conflict”.

In evidence given to the Committee, Daniel Levy, director of the MENA programme at the European Council on Foreign Relations, had earlier said that if the U.S. took a “meandering, erratic, unhelpful, unconstructive, peace-negating position … Britain would be ill advised to align with it”.

The report’s authors, led by Tory former Foreign Office minister Lord Howell of Guildford, said that – in contrast to Trump’s approach – “making progress on the Israeli-Palestinian dispute and supporting the Iran nuclear deal… should be pursued”.

Noting a new “disregard for international institutions” in the role of the Israeli-Palestinian conflict, the peers said the conflict was dealt with “at multilateral level with US support, but ad hoc groupings are now more the norm than the exception”.

The report added that whilst the Israeli-Palestinian conflict “may appear less salient at the moment, it has wider consequences for the sense of Sunni anger and regional stability”.