Britain’s chief mouser is celebrating 10 years prowling the corridors of political power at Number 10 Downing Street.

This Monday marks 10 years since Larry the cat left Battersea rescue centre for a new home with the Prime Minister.

He was the first cat to hold the rat-catching portfolio since stalwart ratter Humphrey was retired in 1997.

Lindsey Quinlan, from Battersea, said: “It seems like only yesterday that Larry came to our cattery as a stray in need of a home. I don’t think anyone back then could have imagined just how incredible his life would turn out to be.

“Throughout his time at Number 10, Larry has proven himself to not only be a brilliant ambassador for Battersea but also demonstrated to millions of people around the world how incredible rescue cats are.

“His rags to riches tale is yet more proof of why all animals deserve a second chance — one minute they may be an overlooked stray on the streets, the next they could become one of the nation’s beloved political figures, with fans around the world.”

During his tenure, Larry has been a trusted companion to three Prime Ministers, beginning with David Cameron.

Despite rumours he disliked the feline, Mr Cameron, in his final speech to Parliament, confirmed the pair were friends and said: “Sadly, I cannot take Larry with me — he belongs to the house and the staff love him very much, as do I.”

Larry stayed on to offer his support to Theresa May and was notably caught live on camera being forcibly removed from his sunbathing spot and escorted away by security to ensure he would not upstage her outgoing announcement.

The 14-year-old now works under Boris Johnson and in December 2020 was seen adding to the Brexit drama by getting caught in a scuffle with a pigeon.

The tabby stalked the bird outside the Prime Minister’s official residence as members of the press — who were waiting to hear from Mr Johnson — watched on with their cameras poised.

He has met a number of world leaders, including President Barack Obama who visited in 2011. Although Larry is normally unfriendly towards men, he did not appear to mind Mr Obama.

When the next US president Donald Trump visited in 2019, Larry was seen creating a potential security threat by taking his afternoon nap under Mr Trump’s car.

Even something as simple as getting caught in the rain was enough to melt the hearts of the nation, and in 2018 video of a damp Larry being escorted through the front door by a kind policeman went viral.

However, Larry was less popular with feline rival Palmerston, who lived at the Foreign Office until he retired in August 2020.

A Number 10 spokesperson said it was “proud” to support Battersea: “A much-beloved member of the No 10 team, Larry plays a vital role as Chief Mouser and in delighting staff and the public alike with his playful antics.”