Scarborough-based supermarket chain Proudfoot Group believes introducing natural daylight to its oldest store will provide a boost to sales.

The company's 61-year-old outlet at Seamer, North Yorkshire, is getting an environmentally-friendly make-over, which will include the installation of 28 'sky tunnels' that channel daylight into the store.

Joint managing director Ian Proudfoot said this would save energy, and increase sales because natural light makes products look more appealing to customers.

"By the most conservative estimate, the profit from increased sales associated with daylight is worth 19 times more than the energy savings," he said.

The store is also to be fitted with insulation material designed by NASA, heat exchange pumps, high-efficiency refrigeration compressors and a solar-powered water heater. Solar cells are to be fitted on the roof and planning permission for a wind turbine is pending.