Here is a list of nutritional information links and resources, with a short description on each. Every link on this page will open into a new window so you won't lose this site.

Calorie Connect provides personalized data on the calories you consume in their food and the calories that you burn during exercise.
http://www.calorieconnect.com/

A resource of information from the BBC on healthy eating and nutritional values.
http://www.bbc.co.uk/health/healthy_living/nutrition/

A good government reference website on food labels so you can understand the nutritional values on the packets of what you're eating.
http://www.eatwell.gov.uk/foodlabels/

Adult's "GDA" (Guided Daily Allowence) and Child's "GDA's" from Nestlé.
http://www.nestle.co.uk/Nutrition/NutritionInformation/