I don't think the booster and baby seat will either be approved or too safe facing backwards, but when they fly the nest and the landy's still goin strong, i'll face em backwards and run dads taxi service from it!
Child seats i know are illegal on sideways facing seats, the only thing that isn't is nothing so i can legally drive the toddler round with no booster or other protection but if i want to be safe i have to mod the motor!