That doesn't look like the same girl to me.
There is a brief shot of this girl in Episode 3 of "The Singing Detective" . It looks a lot like a young CZJ.
vlcsnap-2010-05-25-17h39m27s234 on Flickr - Photo Sharing!
This one is an actual school piccy
czjones2[1] on Flickr - Photo Sharing!
That doesn't look like the same girl to me.
I see a likeness but I don't think it's her.
Catherine would have been 16 or 17 when The Singing Detective was made so I doubt if it's her.
It was the eyes that really stood out, but as mentioned the age is out.
Regardless of that, the young girl bears only a passing resemblance to the real CZJ. Don't you think you should have put a question mark in your thread title?name='Tony Pendrey']as mentioned the age is out.