The cat has witnessed half a dozen government leaders arrive and depart, greeted world leaders and princes at the iconic entrance of Downing Street, and is shortly set to become the longest uninterrupted occupant since Pitt the Younger.
While the landscape of British politics has transformed significantly over the past decade and a half, the feline has remained a comforting constant. His enduring popularity - the type that many leaders would covet - is now showcased in a new documentary series exploring the country's affection for cats.
"Larry is definitely the person to encounter at Downing Street," stated one political source, adding that he "has the run of the house."
The tabby, whose official title is Chief Mouser of the Government at 10 Downing Street, was taken in from an rescue center to tackle a rodent problem. His journey from stray feline in Wandsworth to government resident represents a true humble beginnings story that surpasses many official life stories.
When strains ran strong during the coalition government, former leader the ex-PM was keen to dispel any suggestions of animosity between him and the nation's new favorite feline. "This rumor is I don't love Larry - I certainly do," he announced during one government meeting.
Now a more established presence, Larry appears fully accustomed to the attention. Often seen on live TV waiting calmly by the entrance, his calm behavior in front of cameras has become somewhat troublesome for the Downing Street gardener - Larry frequently goes to the main flower patch to do his business.
His government profile describes the elderly tabby as spending his time greeting guests, checking security defenses, and evaluating historical pieces for sleeping quality. His regular duties include considering answers to the rodent presence in the house.
While the cat is the first to hold this particular position, cats have been welcomed in the halls of government for at minimum a hundred years. "Consistency is an vital part of the cat's appeal," noted one expert who has studied people-pet relationships.
The cat has an acute sense of official timing. "As soon as moment something occurs on the street, especially an formal visit, like clockwork, he'll be outside the main," remarked a Downing Street insider. "He adores the attention."
Former US President Barack Obama and Ukraine's President Volodymyr Zelenskyy are among the world figures he has impressed. However, not leaders were similarly fond.
"The former PM famously disliked him because she was a canine person," said one camera person who has seen several politicians attempting, and unsuccessfully, to stroke Larry.
When he isn't treading the sidewalks, his frequent resting spots include the office equipment and in-trays, but his preferred spots are on the ledges on either sides of the front door.
The cat's popularity with the people remains undeniable. There are various online profiles devoted to the nation's top cat, including one with over eight hundred sixty-eight thousand fans. Larry also gets fan mail, toys, and snacks from across the world and has recently been included in a book about political pets.
As top cat, Larry inevitably receives his portion of criticism. One government analyst recently called him as "excessively fat and excessively lazy to really perform his job," claiming him of being "welfare reliant."
In response, sources close to the cat have issued a strong rebuke. They clarify that he is not at all publicly funded, with Downing Street staff willingly covering his expenses.