Rishi Sunak is facing a significant rebellion from Tory MPs over legislation to revive his plan to send some asylum seekers to Rwanda.
The amendments underline the scale of Tory division over the policy, which the PM has made a priority.
Ministers insist the bill allows only a vanishingly small number of appeals.
Those backing the amendments include former Tory leader Sir Iain Duncan Smith and a clutch of former cabinet ministers, including former home secretary Suella Braverman.