The move fulfilled Mr. Starmer’s July pledge to proceed with recognition unless Israel met specific demands, including agreeing to a cease-fire in Gaza. The group filed a petition on September 7 that accuses the U.K. of “serial international law violations” during the British Mandate for Palestine between 1920 and 1948. The 400-page document calls on the government to accept responsibility for what the petitioners characterize as a “century of oppression” inflicted upon Palestinians. The Palestinian Authority president, Mahmoud Abbas, has long championed such demands, using international forums to press Britain for accountability. “We call for reparations, we call for compensation in accordance with international law.”While the petitioners define reparations broadly as “restitution, compensation, and satisfaction, either singly, or in combination,” they avoided specifying exact financial figures.