All this is supported by quarterly face-to-face supplier meetings, an annual conference and a dedicated website offering tools, guidance, incentives and the opportunity for suppliers to share success stories.
Such stories include individual achievements like zero waste to landfill, 50% reduction in water use, 290 tonnes of waste savings, 30% less energy use, 10% reductions in staff turnover, fewer accidents and salary increases of up to 50%.
To date, 250 food suppliers have adopted the ethical and environmental guidance; 1,380 clothing factories are compliant with M&S's environmental and chemical policies; and 25% of products have sustainability elements.