Suella Braverman has fired a warning shot to Rishi Sunak, amid the looming threat of a rebellion on the Government's Rwanda Bill.
In her first television interview since she stepped down from her role as Home Secretary, due to air on GB News from 1pm, the former Home Secretary warned: "Woe betide a Government that betrays the people again."
MPs will vote on the legislation next week.
Speaking about the possibility of a rebellion on the bill next week, she said: "This is not about bringing down the Government.
Suella Braverman has fired a warning shot to Rishi Sunak, amid the looming threat of a rebellion on the Government's Rwanda BillPA/GBN"This is about delivering a bill that works and stopping the boats.
"I'm here because I believe vividly in things. I'm here because I believe passionately in delivering for the British people.
"They are fed up with the boats. They are fed up with broken promises."
She added: "This is our last chance to get it right. And woe betide a government that fails the British people again."
Sunak said earlier this week that he welcomed “bright ideas” which would ensure that his Rwanda plan works to break the business model of the cross-Channel people traffickers.
New amendments, backed by former Immigration Minister Robert Jenrick and Sir Bill Cash, are aimed at stopping judges on the European Court of Human Rights from frustrating ministers’ implementation of the Rwanda play.
Jenrick, who resigned as Immigration minister over weaknesses in the Government’s Rwanda bill, warned: “The stakes for the country could not be higher."
But former Cabinet minister Robert Buckland told GB News that the One Nation caucus of Tory MPs will not support them, dubbing the amendments "fundamentally unconservative".
The One Nation caucus is expected to put forward their own amendments to the legislation, which are expected to be incompatible with those put forward by the "five families".
ADDITIONAL REPORTING BY CHRISTOPHER HOPE