Thank you for all of your replies. All interesting and helpful to read.
So to be clear.
2 years ago, when our 3 year old was one we wanted him to be rear facing. They bought (against our suggestions, that they even asked us about) a forward facing car seat for babies over 9kg which at the time was still legal but not deemed safe in many articles and research that I did. PIL agreed not to use it. I don’t believe they have ever used it as they haven’t needed to.
Last week they used this car seat, which is suitable for children, forward facing until 18kg. Our child is over this weight limit and we told them that they can’t use the car seat for him. Again, we offered to buy one that was suitable for him to use. They said no. I am aware we maybe should have put our foot down but we just presumed they still didn’t require a car seat. As far as I’m aware, they haven’t had our youngest in it. They were picking eldest up from nursery (just round the corner from their house) it was wet and they thought they would chance it. I’m unsure if it’s illegal to carry a child in a restraint that is too heavy for the seat? It certainly isn’t safe.
Anyway, I know it’s a bit confusing. I hope you understand what I mean. The bottom line is, they’ve ignored our wishes re safety and it’s really bothered me they have done this. My parents think the car seat laws are crazy and often go on about ‘oh in my day....’ but they put up with our wishes as parents and do as we ask.
The whole free childcare thing that someone brought up is irrelevant here. We could pay for childcare, that’s not the issue but our PIL offered to have our boys a day a week and it would be nice for them to have a relationship with their GP. That shouldn’t just waiver our rights as parents to decide what is best in terms of safety though, surely!
I should also make clear, which I didn’t in my original post, that my message was sent after the heated discussion. Before DH went and spoke to his mum. It wasn’t after.
If it was my decision alone, I’d send them to a local nursery/childminders but no one wants to cause a rift in the family. A new car seat has been bought but I’m just going to find it very difficult to face them this week.