I'm in Wales too and we have had the carrier-bag charge for about 3 years. It took a bit of getting used to but as others have said, now it has become second nature to take bags whenever we go shopping. I usually keep some in the car. The money collected from the 5p charge is given to charity (although I'm not sure if this is a legal requirement or just good publicity).
Have you stopped buying papers?
Retiring and living frugally in money from downsizing after years of stress
). Most places in France have no bags at all, so you have to take your own - that's how it should be here and everywhere..
That is a new one on me!