I know the discussion has moved on, but regarding car seat safety, it's all about the force of the impact throwing you forwards (or backwards into a rear-facing seat). Whereas an adult might suffer a whiplash injury, a child under four has a head proportionally much bigger to the muscles and ligaments attaching it to the rest of its body. This means they are at far higher risk of internal decapitation and death.
Germany is no better than Britain in promoting rear-facing seats for longer than the first year (worse if anything, since I've only even heard of extended RF from reading MN). I have read that in Sweden, where chikdren are RF until age 4, there are virtually no deaths in that age group in vehicle collisions.
Also been feeling the rage when teaching children. Only have to get through next week, though, and then I never have to do it again (well, at least until dc2 is in daycare).