Now that's scary and a worry that a child of that age should even need to go on a diet, let alone need to lose that much weight.

I've taught my 9 year old that all food is ok - in moderation. We have takeaway once a week, and the rest of the weak we eat healthy, balanced meals. On occasion she gets a little treat in her lunch box too. She also understands the importance of keeping active and we encourage her by supporting her sporting interests, going for walks, taking her to the park with a friend on rollerblades etc. She loves it.