Ban Plastic Carrier Bags

I work in a shop and am horrified by the number of people asking for plastic carriers, sometimes just for one small item. We don't even charge them as we are too small. Multiply our shop by all the shops who give or even sell plastic carrier bags and the impact on the environment is immense. Many people now carry their own cloth bags and if plastic bags were not freely available, everyone else would learn very quickly, to do the same.