Nutrition declarations

Application of nutrition labelling rules comprise energy value plus the amounts of fat, saturates, carbohydrate, sugars, protein and salt.  The content of the mandatory nutrition declaration may be supplemented with an indication of the amounts of one or more of the following:

(a) mono-unsaturates.
(b) polyunsaturates.
(c) polyols.
(d) starch.
(e) fibre.
(f) vitamins or minerals present in significant amounts.

Scope Categories of food covered
Non-prepacked food covers the following categories:
• Foods offered for sale to the final consumer or mass caterers without prepackaging.
• Foods packed on the sales premises at the consumer's request. and
• Foods prepacked for direct sale. Content Nutrition labelling requirements for non-prepacked food

There is no requirement for nutrition information to be provided for food sold non-prepacked.  But if you provide information voluntarily, it must be in one of the following formats:
• the full “mandatory” nutrition declaration (energy value plus amounts of fat, saturates, carbohydrate, sugars, protein and salt). or
• energy value only. or
• energy value plus amounts of fat, saturates, sugars and salt (energy + 4).

Distance selling
Application of distance selling rules to nutrition labelling

When you offer prepacked food for sale by means of distance communication, you will have to make available nutrition information before the purchase is concluded and provide this information on “the material supporting the distance selling” (e.g. on a website) or by “other appropriate means” (e.g. by means of a telephone information line), which should be provided at no additional cost to the customer.

Guidance can be found at https://www.gov.uk/government/uploads/system/uploads/attachment_data/file/207842/2013-06-19_Nutrition_Technical_Guidance.pdf
  
Nutrition Panel Calculator

Australia New Zealand Food Standards' (FSANZ) Nutrition Panel Calculator (NPC) helps food manufacturers calculate the average nutrient content of their food products and prepare a nutrition information panel. http://www.foodstandards.gov.au/industry/npc/Pages/Nutrition-Panel-Calculator-introduction.aspx