Chuka Umunna has described Boris Johnson’s threat to suspend Parliament to get a no-deal Brexit past MPs as “dictator-type stuff.”
The newly-elected Prime Minister has refused to rule out the move, prompting the Commons to pass a backbench amendment intended to prevent a suspension.
The Bill effectively keeps Parliament open until December by requiring a fortnightly report on the progress of talks on restoring the Northern Irelend assembly, and passed by 41 votes.
“Boris Johnson has left on the table the idea of him actually suspending Parliament to stop Parliament intervening on behalf of the people to stop a disaster," Mr Umunna told talkRADIO's Julia Hartley-Brewer.
"That is kind of Banana Republic dictator type stuff."
The Liberal Democrat MP is against Brexit, and said he would do "everything" to stop it, a stance echoed by his party.
“Where you have the prospect of the new Conservative Prime Minister trying to take our country out of European Union without a deal, it would be wholly right for all of us to do everything lawfully and peacefully to stop it," he said.
On the news that Mr Johnson is to become Britain's next leader, Mr Umunna called it "deeply dark and depressing".
He claimed the new Prime minister was an “over-excited public schoolboy who’s just found the keys to the tuck shop."