Hello, I am looking into obtaining an 850 estate (station wagon). I currently have 3 children under 5, and a fourth on the way. What experience do people have of accomodating child seats, especially in the 6th and 7th seats? Am especially concerned to ensure that what I get will be able to accomodate 4 child seats as per UK law, and also wondering about the middle seatbelt, and what sort of child seats work with it. Thanks! S.