Harry Tuffins has distributed 80% fewer carrier bags in its Welsh stores since the Welsh government introduced a compulsory 5p charge on single-use bags earlier this month.

The indie, which has four stores in Wales, said the charge had gone "reasonably smoothly". "In the run-up to the law being ­introduced, we were concerned customers would be offended," said MD Paul Delves.

"But they seem to understand the rationale behind the move, especially when they realise proceeds are being donated to local ­charity Hope House."

During the past couple of weeks customers had either brought their own bags, purchased a Tuffins Bag for Life or paid the 5p charge, he added.

According to the Welsh government, in 2009/2010 Welsh shoppers took home 350 million carrier bags from major supermarkets or 273 bags per household.