If you have faced resistance from family when rear facing your kiddos, did you have any hard hitting facts or video links to show them? If so could you share them with me?

Family are already giving us grief about why we won't use their seats when we move (not safe for extended rear facing) because typically kids are turned around at nine months in the UK.

Part of me is all about saying "our kids, our business" but the other part of me would like to coherently and calmly tell them why it is safer.