The Scottish Tory leader has blamed public anger over Partygate for a disastrous local election performance which saw the the party slump into third place.
Douglas Ross warned Boris Johnson "can't ignore the message" from voters after the Tories shed more than 60 councillors north of the border and sustained losses across the rest of Britain.
The SNP finished as the largest party in Scotland, with Labour jumping to second in a boost to the party's efforts to rebuild.