Boris Johnson could be joined in Downing Street by a new companion - a pet dog.
The Prime Minister is understood to have raised the prospect of bringing in man's best friend when he addressed staff in Number 10 for the first time.
Mr Johnson suggested the idea to cries of approval from the assembled staffers.
Insiders acknowledged that any new four-legged resident of Number 10 would have to get on with Larry the cat, who was originally brought in by David Cameron to deal with the Downing Street mice.
"It would have to be a dog and a cat that get along," one source said.
It is thought if Mr Johnson does go ahead with the idea, he is most likely to go for a rescue animal, possibly like Larry from Battersea Dogs and Cats Home.
The last resident of Downing Street to have a pet dog was George Osborne, who brought in a bichon frise called Lola when he was Chancellor.