Boris Johnson is under fresh pressure to quit as three more Tory MPs broke ranks in the wake of Sue Gray's scathing Partygate report.
Conservative MP John Baron said he did not believe Mr Johnson's claims that he was unaware of the scale of lockdown boozing in Downing Street laid bare in the dossier.
"Therefore, his repeated assurances in Parliament that there was no rule-breaking is simply not credible," he said.
