A Labour MP was barred from the Commons chamber this afternoon after repeatedly branding Boris Johnson a ‘liar’. Dawn Butler was told to leave by the chair after delivering an extraordinary rant about how ‘poor people have paid with their lives’ because of the PM ‘misleading the House’. The former frontbencher was asked to withdraw her remarks – which flouted parliamentary etiquette rules – by fellow Labour MP Judith Cummins, who was presiding over the session.