The cat has witnessed half a dozen government leaders arrive and depart, welcomed world leaders and royalty at the famous black door of No 10, and is shortly set to become the most enduring continuous resident since historical figures.
While the scene of UK government has transformed significantly over the past decade and a half, Larry has remained a comforting steady presence. His lasting popularity - the type that many politicians would covet - is now showcased in a new documentary series exploring the country's affection for felines.
"Larry is definitely the person to encounter at Downing Street," commented one political insider, adding that he "enjoys the run of the house."
Larry, whose official designation is Chief Mouser of the Cabinet Office at the Prime Minister's residence, was taken in from an animal shelter to address a pest issue. His journey from homeless feline in south London to official resident represents a true rags to riches story that outshines many political biographies.
When strains ran strong during the political partnership, former Prime Minister David Cameron was keen to dismiss any rumors of dislike between him and the country's new favorite feline. "This rumor is I dislike Larry - I do," he declared during one government meeting.
Now a increasingly established figure, the cat appears completely accustomed to the spotlight. Often seen on live television waiting patiently by the entrance, his relaxed demeanor in front of cameras has become somewhat problematic for the Number 10 groundskeeper - he frequently visits the front flower patch to relieve himself.
His official profile details the elderly tabby as spending his time welcoming guests, checking protection measures, and evaluating antique furniture for napping quality. His regular duties include considering answers to the mouse occupancy in the house.
While the cat is the initial to hold this specific title, cats have been accepted in the corridors of power for at minimum a hundred years. "Consistency is an vital part of the cat's appeal," explained one expert who has studied people-pet relationships.
The cat possesses an acute sense of diplomatic timing. "As soon as minute anything occurs on the road, especially an formal visit, like routine, he'll be outside the main," commented a Downing Street insider. "He adores the attention."
Ex- American President the former president and Ukrainian leader Volodymyr Zelenskyy are among the world figures he has charmed. However, not all leaders were equally enamored.
"Theresa May notoriously disliked him because she was a canine lover," explained one photographer who has witnessed several politicians attempting, and failing, to stroke Larry.
When not walking the sidewalks, Larry's regular sleeping places include the office equipment and in-trays, but his preferred spots are on the ledges on either side of the front door.
The cat's popularity with the public remains undeniable. There are various social media accounts dedicated to the country's top cat, including one with over eight hundred sixty-eight thousand fans. He also gets fan mail, toys, and treats from around the world and has recently been featured in a book about political pets.
As top cat, he inevitably gets his share of criticism. One political analyst recently described Larry as "too fat and too lazy to really do his duties," accusing him of being "welfare dependent."
In response, insiders near to Larry have released a strong response. They explain that Larry is not at all publicly paid for, with Downing Street employees willingly paying his expenses.
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