Pay attention to your child’s advertised diet — to all the foods they see advertised — and realise how unhealthy it is.

The Government is being urged to clamp down on digital marketing of junk food as a new report reveals food and beverage firms are using Facebook to market unhealthy products to children.

Pre-school children can identify Coca-Cola and Coco Pops far more readily than Actimel or cheese strings even though similar TV advertising time is devoted to each of these brands, according to research.