British Prime Minister Boris Johnson suffered four staff defections on Thursday as pressure intensified on the embattled leader over lockdown parties and his loose-lipped style of politics. One of the departures was linked to an inflammatory remark made by Johnson, attacking opposition Labour leader Keir Starmer over a notorious paedophile. "Being honest, I wouldn't have said it and I'm glad the prime minister clarified it," finance minister Rishi Sunak said in an extraordinary rebuke of his boss during a televised news conference. Sunak is tipped as a leading contender to replace Johnson, if a brewing Conservative revolt against the prime minister develops further. Downing Street confirmed that chief of staff Dan Rosenfield was leaving, just over a year after he took on the role with a brief to professionalise Johnson's chaotic operation. His resignation comes after a top civil servant, in a long-awaited inquiry, this week condemned "failures of leadership" in Downing Street over a series of parties held in violation of Covid restrictions. Also going is Johnson's "principal private secretary", Martin Reynolds, who sent a now-notorious email in May 2020 urging Downing Street...