Here's a little retail detail bit. Jeeta Bhadal runs a Londis in Leeds and he rang to say that he had started charging 5p for carrier bags. It's win-win, he says.

"It has reduced consumption, reduced the burden on the environment, and the money raised goes to charity."

His daughter has diabetes so that's the charity. "We put signs on all three tills giving advance notice to customers and we have trained all our staff to explain it. We started at the beginning of September and in just one month we raised £228.30. We only had one formal complaint. Someone who thought the store was Londis-owned contacted head office to see if it was a scam."