Shocked at what dd told me about travelling in CM's car

[Toots]

DD1 who's 5 told me last night that she went with her CM, who usually walks her home from school, to collect another mindee in the car. She said she was in a seat like DD2's one, a second stage one, the kind that still has an integral harness - ie far too small. Bu - and hold on to your hats - that that the seat WAS NOT SECURED BY THE BELT, and that when the CM stopped she fell forward in the seat and and was pushed back by the CM and that this happened several times.
I am really shocked as you can imagine and need to bring this up with the CM. Would appreciate some thoughts on how to go about this.

I have one like this. We bought it because DS's previous stage one seat broke and he was slightly under the weight for a stage 2 seat. He has had it as a stage 2 seat for years now (he's nearly 6 and was a chubby toddler). He is sltightly under the weight for a stage 3 seat now and DD is slightly under the weight for a stage 2 seat. But presuambly mumma has checked the mindee's weight.