"shazzbat" gurgled happily, sounding
much like they were saying:

My daughter's 206 is letting in water, which is lying in a puddle
beneath the back seats and making them wet. She tells me that someone at
work has the same problem, as does a friend of that workmate, so I
assume it's common on these. Any experience of it and how it's sorted
would be handy before I get to have a look at it.

Go on, give us a hint...

Since the water ingress is probably around the back of the body, is it a
three door? Five door? Estate? Convertible? Sunroof?