The government's new cost of living tsar called for Boris Johnson to quit over Partygate and said the PM is not "particularly blessed" with "intelligence or integrity".
In a series of tweets which emerged today, David Buttress, founder and former chief executive of Just Eat, said the PM had "to go" over rule-breaking parties in Downing Street and that voting Conservative in Wales was "self harm".
He has also accused the government of "prejudice, lack of common decency and humanity" over its treatment of asylum seekers crossing the Channel.
