M&S took a lead in charging for carrier bags and have subsequently reduced the amount handed out by a staggering 80%. My view is that this is a good initiative but that the issue of carrier bags has been given far too much attention, given the relatively small impact they have.
Early in 2008 I was asked by M&S to write a briefing paper on carrier bags, which they published on their website -featured below or available to view or download via this link julia_leafletV5. They also recorded a video podcast of me talking about the subject. Unfortunately, I can’t track this down (Oct18), so it’s got lost in the ether!