And just like smoking and its second-hand health effects, second-hand fat should be a serious societal concern.

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Previous reports recorded a "sharp decrease" in "non-smokers exposure to second-hand smoke" following the ban in smoking in public places in 2006.

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Worldwide, as many as 40% of children, 33% of non-smoking men and 35% non-smoking women were exposed to second-hand smoke in 2004, researchers found.

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Anti-smoking campaigners and many poor countries, on the other hand, want health to take precedence over trade.

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As well as issuing fines, the enforcement officers will also hand out health board information to offenders on how to give up smoking and where cessation clinics can be found.

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There is plenty of evidence that "second-hand" smoke - breathed when you are in the same room as someone smoking - can be harmful, particularly to children, and some parents adopt a strategy of never smoking in their child's presence.

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While the ban on smoking in public places in Scotland has reduced the amount of second-hand smoke children are exposed to overall, it has not reduced the number of children being exposed to smoke in cars.

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Lest we dismiss out of hand the potential importance of a single email, such an email could well be a smoking gun in any given case.

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Helen Armstrong told the court she overheard Mr Mosley say in a smoking room at Gala Bingo in Derby: "I think I should hand myself in".

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