Unwelcome Plastic Bags

We are often bidden to avoid using plastic bags, and to pay for any we do use, yet plastic bags from charities often come through the letter box uninvited. We are bidden to fill them with unwanted clothing, but I guess that the great majority are just thrown away.

We are charged 5p for even small and very flimsy plastic bags for shopping. The charity bags are both larger and made of thicker material. I guess they use around 20 times as much material as the small supermarket bags. I suggest charities are charged one pound for every univited plastic bag they push through our letter boxes.