The introduction of charges for single use plastic carrier bags has been a big success. Since charging 5p a bag & using incentives M&S say the number of bags taken home has fallen 80% from 460million a year in UK to 80m. The National Trust now charges 5p per bag & has reduced plastic bags given out by 85%. Tesco’s had a 50% reduction. Sainsburys did not reveal their figures. Guardian 1.5.09