British Prime Minister Boris Johnson said on Saturday he aims to remain in power until the middle of the next decade, despite calls for him to quit, which would make him the country's longest continuously serving leader in 200 years.
The PM insisted that he is already thinking well beyond the next election — and planning for his third term.
Boris Johnson has said a "psychological transformation" in his character is "not going to happen" after by-election defeats led to calls for change.
The PM was responding to Tory party chairman Oliver Dowden saying it could not be "business as usual" as he quit.
Boris Johnson told BBC Radio 4's Today programme, he "humbly and sincerely" accepts criticism.
But he said he also had to distinguish between "criticism that really matters and criticism that doesn't".
The by-election defeats in Wakefield and Tiverton and Honiton on Friday came after the prime minister faced months of criticism over parties in Downing Street during lockdown, alongside soaring inflation and a narrower-than-expected win in a confidence vote from his own MPs.
Speaking from the Commonwealth heads of government meeting in Rwanda, Boris Johnson repeatedly said that policy was more important than allegations about his conduct.
Boris Johnson said: "As a leader, you have to try to distinguish between the criticism that really matters and the criticism that doesn't."
Asked if there was any matter of principle he would consider resigning over, he said if he had to abandon Ukraine because it became too difficult or the costs were too great, he would quit.
He said that "of course" he regarded morality as a part of leadership.