The chains are planning to retrofit their stores

锘縍etail giants Tesco and Marks & Spencer have pledged to invest substantial sums in retrofitting energy efficiency measures into their stores.

At the Supermarkets Conference last week, hosted by 黑洞社区鈥檚 parent company UBM, both retailers admitted retrofitting was one of their 鈥渂iggest challenges鈥. But they said they were making resources available to tackle the problem.

Both supermarkets said they had identified M&E improvements as a source of energy savings.

Munish Dutta, head of Property Plan A at Marks & Spencer, told 黑洞社区 the retailer was freeing up 鈥渕illions鈥 of pounds to invest in M&E across its estate.

Dutta added that the investment is likely to be channelled through the retailer鈥檚 existing M&E contractors.

Marks & Spencer is evaluating whether to fit LED lighting across all its food stores after a trial of the system at an eco-store in Sheffield.

Martin Young, Tesco鈥檚 chief architect, also said the chain has committed to overhauling its stores to make them more sustainable as part of its 5-10 year rolling retrofit program.

Tesco will use a 鈥渓earn and benchmark鈥 approach to roll out the most effective sustainable measures across its estate, he added.

The retailer is also looking closely at rolling out LED lighting, subject to successful trialling of the product indoors and outdoors.

Both retailers indicated they would aim to get construction firms on board earlier in the development process to help them meet their challenging sustainability targets.

They also indicated that they are likely to invest in energy-saving CO2-powered fridges and were looking at adding doors to them to save energy - about a third of the retailers鈥 energy is consumed by refrigerators, they said.

But Steve Fuller, M&S鈥檚 head of construction delivery, appeared to rule out investment in on-site renewables, telling conference delegates the sums did not add up 鈥渂y miles鈥.