“We cannot have a situation in which parliament is shut down – we are a democratic society,” the Telegraph quoted Bercow as saying at an event on the sidelines of the Edinburgh Festival.
“And parliament will be heard and nobody is going to get away, as far as I am concerned, with stopping that happening,” added the 56-year-old who says he voted “Remain” in the 2016 Brexit referendum.
Johnson has said Britain will leave the world’s biggest trading bloc on Halloween, whether it has a divorce agreement or not, but a majority of lawmakers oppose that.
They have been investigating what parliamentary procedures can be used to prevent a no-deal Brexit, and in July backed proposals to make it harder for Johnson to do that.
Johnson, who replaced Theresa May on July 24 after she failed three times to get her withdrawal agreement through parliament, has refused to rule out proroguing the House of Commons and Brexit supporters have vociferously encouraged him to do so if necessary to ensure an exit on Oct. 31.