UK Car seat no chest clip?

Kathleen

A friend of mine in the UK posted a photo of her daughter in her car seat and there was no chest clip. The strap had actually fallen off of her shoulder as well. Which I assume would happen often if there is no clip.

I googled it and found that they are actually illegal, is this true?

Do any UK moms on here know why?

In the US they make such a big deal about chest clip safety and proper placement so I just find it strange.