In November 1997 , Humphrey 's primary carer , Jonathan Rees , who worked in the Prime Minister 's Policy Unit , wrote a memo stating that the cat should retire to a `` stable home environment where he can be looked after properly '' .
In November 1997 , Humphrey 's personal caregiver , Jonathan Rees , who worked for the Prime Minister , wrote a letter saying that the cat should retire to a `` stable home environment where he can be looked after properly '' .