McCain Rustic oven chips Advert: 'Eat your greens'

"Not for a minute,"insists a spokesman from McCain's ultra-slick PR agency, "are we suggesting a portion of oven chips might be as good for you as a portion of fresh veg, or part of your five-a-day or anything. That's not the idea at all."

"McCain's Rustic Oven Chips are the only chips to score 'green' on all four counts in the Food Standards Agency's new traffic light food labelling scheme,"says the spokesman proudly. "They're low in fat, low in saturates, low in sugar and low in salt."

So when the ad - which, if you happened to travel on public transport at all this weekend, you would have had some difficulty escaping - says "Eat your greens", the word "greens"is actually being used in its now commonly accepted sense of "traffic lights". As opposed to, say, vegetables.