Welsh environment minister John Griffiths has claimed the 5p tax on carrier bags in the principality should be rolled out across the rest of the UK.

Griffiths was behind the introduction of the levy a year ago today. Figures published in July suggested bag use had fallen by more than 90% since it was brought in. The levy has also raised £800,000 for charities including Keep Wales Tidy.

“I think the Welsh experience proves that if you want to effectively reduce carrier bag use, a charge really is the best way to go,” Griffiths said.

“I have been really impressed by the ease with which Welsh retailers and shoppers have adjusted. I can see no reason why the charge wouldn’t work just as well in other parts of the UK.”

A 5p charge in Northern Ireland will take effect next year.