Keir Starmer's departure from 10 Downing Street was reportedly due to an "intensely personal" decision, as indicated by outgoing UK Prime Minister Rishi Sunak. While the article does not provide specific details about the nature of this personal decision, it highlights that the Prime Minister acknowledged Starmer's reasons for leaving. The context suggests a significant event or circumstance prompted Starmer's exit from the prominent political location. Further information regarding the precise cause or implications of Starmer's departure is not elaborated upon in this brief report.