Sir; If anyone wants to know why the food industry is losing the argument on how best to protect children from unhealthy food marketing, they need look no further than SNACMA's response to our criticism of its claim that it does not advertise to children ('Kids' health group attacks snacks claim', The Grocer, 1 December, p10). Questioned by The Grocer, it transpires this means SNACMA doesn't advertise in children's programmes on TV - and only because Ofcom rules prevent it from doing so. This ignores the fact that more than 70% of children's TV viewing falls outside these hours and it still promotes snacks to children using every other mechanism available. Such spin underlines why the food industry has lost credibility.