Found out from ds1 (8) that he went in friends mums car today without a seatbelt on. He had gone to a playcentre and was gone for some time. He only mentioned the car over dinner this evening. Apparently there were too many in the back of the car and they were squashed in. I don't believe there was a booster seat either. I'm really concerned (and pretty pee'd off too) if this was the case. AFAIK it's illegal to carry passengers without seatbelts done up. Not sure how to bring it up with friends mum tho'. DH would have quite happily taken ds to playcentre in our car had we known it was an issue.