Larry the Cat who lives at 10 Downing Street has been photographed playing with a mouse and letting it escape. He was employed to keep mice at bay but he prefers sleeping to mousing! (Can't post the link) but his humiliation made it to the front page of yesterday's Times. I bet Gladstone and Palmerston are feeling very smug.
Fluffy - yes exactly that. We were shown where they would be living, we spoke to the people who would be in contact with them on a daily basis and one person (who had cats herself and was very welfare minded) has responsibility for their care. Should she leave the Cabinet Office she would need to appoint someone else.
They can roam throughout the building, including where there is some very expensive antique furniture. I haven't yet heard about the 18th century antique sofa being scratched to bits, but it wouldn't surprise me. They were Loc8tor tags so they can be found in the maze of rooms.