Following on from the W.H.Smith thread, I see that Animal Aid have placed an advert on page 19 of todays (Saturday 27 October 2012) Daily Express, calling for a "ban on sales of gun magazines to children." They are asking for donations and will send campaign postcards asking WH Smith and Martin McColl to stop the sale of gun magazines to children. No mention of any age limit. Looks like they are trying to step up their campaign.
p.s. According to their website, it's also in todays Guardian.
http://www.animalaid.org.uk/h/n/NEWS/news_shooting//2772//