Proportion of children underweight, healthy weight, overweight or obese. (A) First year at primary school, Wales.34 (B) Final year at primary school, England.35 . Proportion of children underweight, healthy weight, overweight or obese. (A) First year at primary school, Wales.34 (B) Final year at primary school, England.35 Russell M Viner et al. bmjpo 2017;1:e000026 © Article author(s) (or their employer(s) unless otherwise stated in the text of the article) 2017. All rights reserved. No commercial use is permitted unless otherwise expressly granted.