Budgens and Spar retailer Jonathan James has called fitting doors to his chillers "a great success".

James added doors to the chillers at his Ely forecourt store last month despite warnings from peers that sales would dip.

The doors had not hindered sales and were saving electricity, he said.

"Customer feedback has been excellent," he said, adding that he hoped to share his experience with the independent sector.

Spar retailer James Hall & Co also plans to roll out doors to all its dairy chillers to cut stores' usage.