M&S has launched an initiative to increase the share of renewable electricity used across its fashion supply chain, extending its clean-energy focus beyond directly operated stores, warehouses and offices into garment and textile manufacturing suppliers.

The move targets the segment of M&S's supply chain where Scope 3 emissions reporting has historically lagged and where decarbonisation depends on supplier-level grid and procurement decisions rather than retailer-controlled assets.

For sourcing professionals, the central question is which mechanism the initiative will favour — on-site generation at factory level, power purchase agreements (PPAs) for utility-scale projects, or renewable energy certificates (RECs) purchased through national registries — and what threshold suppliers must meet.

What does the initiative change for suppliers?

Just Style's framing — "boost renewable electricity" — suggests an expansion of existing efforts rather than a fresh target. The published announcement does not specify a percentage threshold, a baseline year, or a supplier coverage number, so the commercial impact for factories will depend on programme documents that have not yet been released.

For tier 1 garment makers in Bangladesh, Vietnam, Türkiye and Pakistan — markets that dominate UK apparel sourcing — grid renewable shares remain low and most factories still run captive fossil generation during load-shedding. Any retailer push for renewable electricity therefore requires supplier capital expenditure on rooftop solar, third-party procurement of certificates, or supply from newly built renewable projects.

Who pays for the green premium?

Industry precedent is mixed. Some retailers underwrite the renewable certificate cost for top-volume suppliers; others require suppliers to source certificates themselves and demonstrate matching through verified tracking systems such as I-REC or equivalent national registries. The commercial question — whether renewable procurement becomes a pass-through cost on the purchase order or a margin-compressing line item — typically dictates supplier uptake.

What timelines and compliance requirements will apply?

A workable programme couples electricity matching with third-party audit, supplier training, and integration into commercial terms so that renewable procurement does not become a box-ticking exercise that suppliers can ignore. Renewable energy claims in textiles have attracted increasing scrutiny from competition authorities and ESG regulators, so verification pathways will matter as much as the headline percentage.

The retailer has not disclosed whether the requirement is mandatory (a condition of order placement), preferential (tied to preferred-supplier status or longer contracts), or voluntary with capacity-building support.

What to watch

The next deliverable is the full programme document — expected to set the percentage threshold, the geography it covers, and the financial mechanics. Sourcing teams should request clarity on:

• The supplier tier scope (cut-and-sew only, or extended to fabric mills and trim suppliers)
• The role of long-term power purchase agreements versus annual certificate purchases
• Whether the requirement differentiates between markets with mature renewable grids and those where captive fossil generation dominates
• The compliance documentation that buyers will accept as proof

For brands benchmarked against M&S, the announcement raises whether renewable electricity in fashion supply chains will become a contractual baseline rather than a voluntary disclosure. Programme details — once published — will determine whether suppliers can absorb the cost, pass it through, or face order reductions.