If successful, the scheme could be rolled out across other branches

Plymouth & South West Co-op decided to run the trial in six shops after its involvement in a successful town-wide initiative in Modbury this year.

The Modbury Co-op branch has cut its plastic bag use by 90% since 1 May.

Co-op shoppers in Moretonhampstead, South Brent, Wellswood, Millbrook, Newton Ferrers and Ipplepen can reuse bags or buy a 5p corn starch bag.

'Need support'

The shops will also be donating a Co-op fair-trade cotton carrier bag.

If it is successful, the scheme could be rolled out across the Co-op's 80 other retail outlets in the South West.

The chain has held information evenings in towns ahead of the scheme

The chain hopes other retail outlets in the towns will follow suit.

We need the support of as many local businesses and residents as possible Plymouth & South West Co-op spokesman

All 43 traders and shopkeepers in Modbury banned plastic bags from shops on 1 May, and sold 100% biodegradable alternatives made from corn starch, canvas, paper or cotton.

Plastic bag consumption at the Co-op in Modbury has since gone from 5,000 to 500 a week.

The new initiative is being launched with support from Modbury's organiser Rebecca Hosking, and Sue Kinsey, Adopt-a-beach officer for the Marine Conservation Society.