Green claims evidence for UK retail supply chains

Before a retailer publishes an environmental claim, someone should be able to explain precisely what the claim covers and produce evidence for it. The same discipline matters to Irish manufacturers supplying the UK market: a supplier description can become a product page, catalogue entry or advertisement downstream.

The UK Competition and Markets Authority published additional supply-chain guidance on 22 January 2026. It explains responsibility for green claims across retailers, brands, manufacturers and suppliers and should be read alongside the Green Claims Code. This article applies that guidance to an evidence and approval workflow. It does not describe Republic of Ireland consumer law or assume that UK guidance governs every Irish sale.

The practical goal is a claim that remains accurate when copied from the supplier file into the customer-facing channel. Our recommended control is a claim record that travels with the wording and identifies who can approve a change.

The Green Claims Code addresses accuracy, clarity, omitted information, fair comparisons, life-cycle context and substantiation. These principles require more than checking whether a sentence sounds reasonable. Review the meaning a consumer could take from the words, surrounding images and presentation.

Start by identifying the subject: the whole product, one component, its packaging, a production process or the business itself. Then specify the attribute, measurement basis and any necessary qualification. A packaging attribute should not become a claim that the entire product is environmentally beneficial.

Ask the marketing owner to write down the intended interpretation. Ask a colleague outside the project to describe what they understand from the draft. If those interpretations differ, revise the claim before debating fonts, icons or placement.

Our suggested record contains the exact wording, SKU or product family, sales territory, channel, evidence owner, source documents, evidence date, limitations, approval date and next review trigger. Link it to the approved artwork or product-page version. Avoid a single generic sustainability folder that leaves the reviewer to guess which evidence supports which statement.

For purchased products, ask the supplier what the evidence measures and whether it covers the specific product and period. A certificate for one facility or material may not substantiate a claim about every product sold under a brand. Record how any sample, allocation or chain-of-custody approach relates to the claim.

Give procurement a clear escalation path when documents are absent or inconsistent. Commercial pressure to launch does not resolve the evidence gap. The release decision should be to substantiate, narrow, reword or remove the affected claim, with the reason recorded.

Imagine an Irish supplier provides a UK retailer with evidence that the cardboard sleeve of a particular product contains 70 percent recycled fibre by weight. This is an invented scenario, not a verified product claim. The marketing draft says “Our sustainable product is better for the planet.” That wording extends far beyond the stated packaging evidence.

A narrower draft might say “The cardboard sleeve contains 70 percent recycled fibre by weight,” but it still needs evidence review for the exact sleeve, measurement basis and relevant production. The carton image, placement and nearby wording also need checking so the statement is not read as applying to the product inside.

A website link can explain supporting detail. It should not be used to hide a qualification that changes the basic meaning of the headline. Have the reviewer inspect the actual mobile product page and packaging layout, not only the claim register.

Extend the fictional packaging scenario with invented weights: the sleeve weighs 10 g and contains 7 g of recycled fibre; the rest of the packaging weighs 30 g and has no evidenced recycled content. Assume all weights use a comparable basis for this exercise.

The sleeve result is 7 ÷ 10 = 70%. The same evidence does not support “70% recycled packaging”: across the 40 g packaging set, the supported recycled quantity is only 7 g, or 17.5%, under these assumptions. Neither calculation establishes the recycled content or wider environmental performance of the product inside.

The review record should preserve both the measurement population and the consumer-facing design. If the artwork shows the whole pack while the qualifier names the sleeve in unreadable text, the arithmetic alone does not resolve the overall impression.

This is a fictional denominator test, not a verified material specification or approved advertisement. Supplier certificates, recycled-content definitions and actual market wording require their own review. No result here should be copied onto a real product.

A product specification can change while the marketing copy remains untouched. Connect claims review to supplier changes, material substitutions, certificate expiry, new markets and new comparisons. Set the next review according to the evidence and change risk rather than assuming every claim lasts indefinitely.

When the evidence no longer supports the approved wording, identify every channel using it. Assign owners for the website, retailer feeds, packaging artwork and sales material. Keep a dated record of the corrected versions and decide how existing stock or customer communications should be handled with appropriate advice.

For a UK and Ireland campaign, maintain a separate market assessment. Reusing the same creative asset across jurisdictions should be a deliberate decision after checking the applicable rules. This article provides no conclusion on Irish or EU legal compliance.

Bring procurement, the evidence owner and marketing together around a short set of actual claims. First read the published meaning; then open the supporting evidence; finally decide whether the wording can be approved. Record disputed points and the person responsible for resolving them.

For each claim, ask whether the product is clearly identified, the evidence is current, the comparison is supportable and the relevant limitations are visible. This is our proposed operating routine, not a regulator-issued certification checklist. It helps expose where a statement has become broader each time it was passed along.

Management should receive the open exceptions and decisions, rather than only the number of claims reviewed. One unsupported headline on a prominent page can matter more than many low-risk edits.

Does a supplier assurance remove the retailer’s need to check? Treat it as an input to the review, not an automatic release instruction. The CMA supply-chain guidance explains why responsibility needs consideration across the chain.

Is a green image harmless without a written claim? Review the overall impression, including imagery. A visual can influence what consumers understand.

Can a narrow claim be made while wider impacts remain? Assess whether its scope and presentation mislead about the overall product. Obtain qualified legal advice for uncertain applications; this article is general operational guidance.

CMA supply chain explainer January 2026 — Primary source supporting the regulatory or methodological statements above. Operational workflows and examples are QSE Advisory recommendations.

CMA Green Claims Code — Primary source supporting the regulatory or methodological statements above. Operational workflows and examples are QSE Advisory recommendations.

CMA Green Claims Code checklist — Primary source supporting the regulatory or methodological statements above. Operational workflows and examples are QSE Advisory recommendations.

Explore more guidance in the Sustainability and Carbon hub.

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