A defiant John Bercow has vowed to “keep buggering on” as Commons Speaker after he was accused of bullying by the second former senior Westminster official in less than a week.

David Leakey, who was Black Rod until last year, said that Mr Bercow displayed “intolerable” rudeness and “explosive” behaviour that terrified his subordinates. The claim follows allegations by Angus Sinclair, the Speaker’s former chief of staff, that he was physically intimidated, demeaned and mimicked before he took “compulsory early retirement”.

Last night Mr Bercow became further isolated when his Lords counterpart suggested that he would allow President Trump to address parliament when he visited Britain. The intervention places him at odds with Mr Bercow, who said last year that he would refuse to let…