[TOMT] Article/Documentary about a Young Girl in the UK with Cancer

The story likely occurred more than a decade ago, but I remember watching this documentary that featured a really sweet little girl (between 5-7), and I also remember reading an article about her and her friendship with another young girl with cancer.

I am almost 100 percent sure the name of the girl was/is “Molly” but I can’t seem to find anything about her.