Nicola Sturgeon has described Boris Johnson as the "worst Prime Minister" in her lifetime in a damning appraisal of his time in office.
Mr Johnson delivered his final speech as Prime Minister this morning on the steps of Downing Street ahead of his Tory successor Liz Truss taking over his position as leader of the Conservative Party.
He took a swipe at independence supporters in his statement, saying they will "never succeed" in trying to break up the United Kingdom.
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In an interview with Radio Clyde today, the First Minister said he had "delivered chaos" to the UK Government and "discredited his office".
She said: "I obviously wish him and his family well but there is no getting away from the fact that Boris Johnson has been the worst Prime Minister certainly in my lifetime.
"He has discredited his office, he has delivered chaos to the government of the UK and he has failed to use the enormous powers and responsibilities and resources that he has at his disposal to make life better for the people he serves.
"He seems to have been more interested in serving himself than the people of the UK, so I'm not sure there are going to be many people in Scotland who are sorry to see Boris Johnson depart as Prime Minister."
Speaking earlier, Mr Johnson said: "We are one whole entire United Kingdom whose diplomats. security services and armed forces are so globally admired.
"As I leave, I believe our union is so strong that those who want to break it up, they'll keep trying, but they will never, ever succeed."
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