The Tory MP called it the “worst moment” he has experienced since entering the House of Commons.
“My Right Honourable Friend the Prime Minister came to the dispatch box today at Prime Minister’s Questions”, he began.
“I confess, I think it was the worst moment I have experienced since I came into the House of Commons.
“I have never been more ashamed to be a member of the Conservative party, or to be asked to lend her support.
“She spent most of her time castigating the House for its misconduct. At no stage did she pause to consider whether it is in fact the way she is leading this government, which might be contributing to this situation.
“I have great sympathy for her. I have known her for many years, and we had a personal friendship beyond and outside this House.
“But I have to say, I could have wept. Wept to see her reduced to these straits, and wept to see the extent to which she was now simply zigzagging all over the place, rather than standing up for what the national interest must be.”
Throughout her PMQs address, she criticised MPs for “carrying on contemplating its naval on Europe and failing to address the issues that matter to our constituents.”
“This House has indulged itself on Europe for too long”, she said.
“They deserve better than what this house has given them so far.”
The leader of the opposition Jeremy Corbyn MP pushed back on the Prime Minister’s sentiment, saying: “The job of Parliament is to hold government to account and the Prime Minister doesn’t seem to understand that.”
Prime Minister May is to address the nation from 20:15 GMT this evening, following a meeting with Mr Corbyn and other opposition leaders.