On the subject of carrier bags, I like Tesco's policy.

I hate Tesco's policy, because I refuse to use a clubcard. I don't trust what they do with all the data they collect.

But yes, it's good that they encourage recycling. Actually the supermarkets aren't the biggest problem. At least there, you only get the number of bags you need for your shopping.

It's city centre stores that are the problem. So many of them will hand you a bag - no choice - no matter how small your purchase. Boots: buy a lipstick, and they shove it in a carrier bag for you. It would fit in your pocket! So you end up with more bags than you really need.