Larry the cat remains chief mouser at 10 Downing Street as the residence changes prime ministers, according to multiple outlets. Reporting notes that Larry has served for about 15 years, continuing to hunt rodents at the prime minister’s official home through the tenures of at least six different UK prime ministers. One source says Larry’s time at No. 10 began in early 2011 after rat sightings around the steps of the residence, which prompted a move to address the problem and led to internal support for bringing in a cat expert. Coverage also describes Larry as a persistent presence amid political turnover, with some accounts characterizing him as “tough” and highlighting his longevity. Another outlet emphasizes that Larry remains a constant resident while British politics shifts, underscoring his role in ongoing pest-control efforts at the address. Overall, sources agree on Larry’s long tenure, his position as chief mouser, and the timeline beginning in 2011.