we have a Citroën xsara picasso with room for 3 seats in back. Have put rf baby seat for newborn behind driver. Front facing seat for 2 yr old behind passenger, and hi back booster for 3.5 yr old in middle.
Side seTs have oxoxox but middle doesn't. Also middle has o ly diagonal belt not lap belt. Is booster safely secured that way? Is there a model that is designed for diagonAl-only belt?