Palmerston, the former Foreign Office chief mouser, has died in Bermuda.
The cat, a rescue from Battersea Dogs and Cats Home, retired in 2020 after four years of service in Whitehall.
In February 2025, a post on Palmerston’s social media account said he had come out of retirement in order to start work “as feline relations consultant (semi-retired) to the new Governor of Bermuda”.
Announcing his death, a post on Palmerston’s X account read: “Palmerston, Diplocat extraordinaire, passed away peacefully on 12 February. “Palmy” was a special member of the Government House team in Bermuda, and a much loved family member.
Palmerston, Diplocat extraordinaire, passed away peacefully on 12 February. “Palmy” was a special member of the Government House team in Bermuda, and a much loved family member. He was a wonderful companion, with a gentle nature, and will be sorely missed. pic.twitter.com/W0V6fRniFj
“He was a wonderful companion, with a gentle nature, and will be sorely missed.”
Palmerston was rumoured to have had a long-running feud with Number 10’s chief mouser Larry during his time in Westminster.
However, a post on his former rival’s X account read: “Farewell old friend x.”
Labour MP Sarah Champion wrote on X: “RIP.”
On his retirement in 2020, a letter to Sir Simon McDonald, permanent under-secretary at the Foreign and Commonwealth Office, read that the cat would like to spend more time “away from the limelight” after enjoying “working from home” during the coronavirus pandemic.
“I have found life away from the front line relaxed, quieter, and easier,” the letter signed in Palmerston’s name read.
“My 105,000 twitter followers show that even those with four legs and fur have an important part to play in the UK’s global effort,” Palmerston’s letter said.
“I have championed our work, built our relationships, and celebrated the diversity of our staff.”
Foreign Office staff paid tribute to the outgoing mouser at the time with Jon Benjamin, director of the department’s Diplomatic Academy, wishing him a “very happy retirement”.
“He left us a slightly chewed dead mouse next to my desk in @UKDipAcademy once, and we were of course not very grateful,” he added.
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