Mr Eastwood said the Supreme Court ruling that Johnson unlawfully advised the suspension of Westminster reveals the extent to which he will undermine the democratic process to get his way.
Said the Foyle MLA: “Earlier in the summer when Boris Johnson sought the suspension of Westminster during a critical time in the Brexit process, I accused him of behaving like a tinpot dictator.
“Today’s ruling at the Supreme Court confirms that he acted unlawfully to undermine the democratic accountability and scrutiny of his government at a critical time for these islands.
“We know that the Leave campaign lied and cheated during the referendum.
“Now it’s clear that Johnson has lied, cheated and acted unlawfully as Prime Minister.
“He is unfit for office.
“Full scrutiny of this government and it’s plans for a hard Brexit must now be restored and challenged immediately.
“Johnson must be removed from office and Brexit called to a halt. the best way to do that is through an election.
“Let people have their say on the actions of this Tory/DUP Government,” added Mr Eastwood.