Unit 1: Fines to back up regulation

Sky has news of fines for tanning salons that allow children to use their sun beds http://news.sky.com/skynews/Home/UK-News/Video-UK-New-Law-Bans-Businesses-From-Allowing-Under-18s-To-Use-Its-Sunbeds/Article/201104215968690?f=rss The BBC has an article http://www.bbc.co.uk/news/health-12998030 a) Why does this law apply to children only? b) To what extent do you believe this legislation will reduce sunbed use by children?