Plastic bag charge comes to England

This, from Sky, explains the market failure and how the charge may reduce it

http://news.sky.com/story/1563854/confusion-over-complicated-plastic-bag-law

and the BBC shows the negative externalities

http://www.bbc.co.uk/news/business-34414750
and
http://www.bbc.co.uk/news/business-34441674

and this shows what happened in Scotland after the charge was introduced

http://www.bbc.co.uk/news/business-34441675