Families whose loved ones died from Covid have called for Boris Johnson to step down as an MP as he faces a make-or-break battle to save his career.
Mr Johnson will be grilled by members of the Parliamentary Privileges Committee in a televised hearing on Wednesday, and could be suspended if he is found to have misled the Commons over Partygate.
He plans to release a dossier - prepared by lawyers who have cost the taxpayer at least £220,000 - in a desperate bid to discredit the investigation into him, sparking fears he may be about to throw aides under a bus.