You might be interested to read these websites:
The Food Commission's "Action on Additives" campaign
The website, http://www.actiononadditives.com/, hosts a growing list of over 275 foods, drinks and medicines which contain suspect food additives. Parents have been adding to the list by submitting products themselves.
Web: http://www.actiononadditives.com/
Jamie Oliver’s Feed Me Better campaign
www.jamieoliver.com/schooldinners
Caroline Walker Trust
http://www.cwt.org.uk/
Food in Schools
http://www.foodinschools.org/
Food Ethics Council
www.foodethicscouncil.org/
Food Standards Agency
http://www.food.gov.uk/foodlabelling/
Which? Kids’ Food
www.which.co.uk/reports_and_campaigns/food_and_drink/campaigns/kids_food/index.jsp
Health Education Trust
www.healthedtrust.com/
School Food Trust
www.schoolfoodtrust.org.uk/
Child Health Nutrition
www.ability.org.uk/child_health_nutrition.html
National Obesity Forum
www.nationalobesityforum.org.uk/
Yale Rudd Center
www.yaleruddcenter.org/
Childsafe
www.childsafeactive.com/
Supporters
Barnardo's
http://www.barnardos.org.uk/
The British Heart Foundation
http://www.bhf.org.uk/
Cancer Research UK
http://www.cancerresearchuk.org/
The Children's Society
http://www.the-childrens-society.org.uk/
Diabetes UK
http://www.diabetes.org.uk/
Food Commission
http://www.foodcomm.org.uk/
National Consumer Council
http://www.ncc.org.uk/
NCH - the children's charity
http://www.nch.org.uk/
Save the Children UK
http://www.savethechildren.org.uk/
Stroke Association
http://www.stroke.org.uk/