“Huge changes” are needed to diets if consumers are to hit new targets on sugar and fibre intake, according to the British Nutrition Foundation.

A new report to be released next week by the BNF warns that fizzy drinks will have to be eliminated completely from diets, unless they are very low or zero calorie.

A raft of other foods, such as chocolate bars, crisps and cakes, will have to be limited to as little as one or two a week, according to M&C’s sister title The Grocer, which has seen the report.

The BNF is set to release a model of the typical diet to meet recommendations on sugar and fibre intake as advised by the Scientific Advisory Committee on Nutrition (SACN).

An example for an adult woman would be a breakfast of 150ml orange juice, two fortified wheat biscuits, semi-skimmed milk, chopped banana; lunch of houmous, spinach and red pepper whole-meal wrap, low-fat plain yoghurt, honey, cinnamon; dinner of fish pie with potato topping, peas, green beans and for snacks a handful of brazil nuts or a plain scone with low-fat spread. Recommended drinks are water, unsweetened tea/coffee with lower-fat milk and zero or very low calorie soft drinks.

SACN is expected to recommend sugar intake be cut by half after a study recommended the maximum daily energy intake from sugar should be reduced from 10 to 5%.