Sources discuss King Charles III’s relationship with his third prime minister, Sir Keir Starmer, as the monarch prepares to appoint the fourth prime minister of his reign. The articles frame the topic around the succession of prime ministers during Charles’s time as king, positioning Starmer as the third person to hold the role. However, the provided excerpts do not include specific details about the nature of their relationship, such as meetings, correspondence, ceremonial interactions, or areas of policy alignment and disagreement. Instead, the available text focuses mainly on the timing of the transition to a subsequent prime minister appointment. Overall, the sources agree on the broad context that Charles is nearing the appointment of another prime minister and that Starmer is the third prime minister of his reign. With the information supplied, a comprehensive synthesis is limited to these contextual points rather than substantive historical particulars.