FAQ · UK sustainability
UK merch sustainability claims FAQ
Answers to common UK sustainability questions on corporate merchandise: the CMA Green Claims Code, the ASA environmental-claims code, GOTS, GRS, OEKO-TEX Standard 100, FSC, the Plastic Packaging Tax and the EPR regime.
UK and EU framework
Two UK regulators shape environmental marketing claims: the Competition and Markets Authority (CMA) through the Green Claims Code, and the Advertising Standards Authority (ASA) through the CAP Code and BCAP Code. The CMA enforces consumer-protection law; the ASA administers non-statutory rules. Both apply to B2B merch claims even when the merchandise itself is consumer-grade.
Beyond marketing claims, the UK has product-level environmental regulations: the Plastic Packaging Tax (PPT) at £223.69 per tonne as at October 2026, the Extended Producer Responsibility (EPR) regime, and the Single-Use Plastics regime banning certain single-use items in England.
The procurement-side due diligence required for ESG reporting (the Modern Slavery Act 2015 statement, the TCFD-aligned climate disclosures, the IFRS S1/S2 sustainability disclosures for in-scope companies) sits on top of the marketing-claim layer.
Pricing and framework
Sustainable merch pricing (exclusive of VAT): GOTS-certified organic cotton apparel + 15–20%; GRS recycled-polyester apparel + 5–10%; OEKO-TEX Standard 100 typically at parity; FSC paper + 4–12%. Sustainability-claim evidence adds cost: independent LCA £4,500–£18,000 per product; EPD £3,500–£15,000 per product.
Lead time
Sustainable merch lead times are 3–5 weeks for off-the-shelf certified products and 4–6 weeks for custom sustainable products. First-time sourcing with a new certified supplier adds 2–4 weeks for the buyer-side due diligence.
Seasonal planning
UK demand is concentrated in Q4 (sustainable gifting has been the fastest-growing merch segment) and Q2 (the run-up to spring and summer outdoor events). Brief submissions in January–February for late-Q2 or Q3 delivery generally work well.
Delivery and hand-over
Delivery and hand-over for sustainable merch follows the standard UK courier map. The plastic-packaging tax implications need to be considered at the packing stage: plastic packaging below 30% recycled content triggers £223.69 per tonne of packaging.
What this is and what it includes
This FAQ answers the most common UK sustainability questions on corporate merchandise. It is written for sustainability leads, procurement directors, brand managers and marketing-communications teams.
Coverage includes: the CMA Green Claims Code's six principles, the ASA's environmental-claims code, the Plastic Packaging Tax, the EPR regime, GOTS, GRS, OEKO-TEX Standard 100, FSC, Bluesign, the corporate-disclosure regimes (TCFD-aligned, IFRS S1/S2, CSRD), and the relationship between sustainability claims and competition law.
When and for whom
This FAQ applies to all UK B2B merch programmes that make environmental claims. It applies to claims made on any channel (website, social media, packaging, advertising, sales collateral).
It is written for sustainability leads, ESG reporting teams, procurement leads with sustainability-related KRAs, brand and marketing-communications teams, in-house legal teams reviewing merch sustainability claims, and smaller buyers working out their own sustainability position.
Specifications and materials
Common UK sustainable merch certifications and their purpose: GOTS for organic-fibre claims on apparel; GRS for recycled-content claims; OEKO-TEX Standard 100 for substance-safety testing on textiles; FSC for paper and wood-pulp claims; B Corp for whole-company sustainability; Cradle to Cradle Certified for product-level circular-economy design.
Common mistakes
The most common mistake is the unqualified eco-friendly claim. The ASA and CMA treat these terms as too vague unless backed by specific substantiation. Pair umbrella claims with specific, evidenced claims.
The second is overstating the sustainability profile of a partly-recycled product. Specify the percentage of recycled content.
The third is failing to document the transaction certificate. GOTS and GRS certifications are tied to a transaction certificate per shipment.
The fourth is making climate-neutral or carbon-negative claims without independent verification. The CMA and ASA have scrutinised such claims.
The fifth is conflating sustainability certifications. GOTS is a textile-specific certification; OEKO-TEX Standard 100 is a substance-safety certification; FSC is a forestry certification. Use each within its proper scope.
Process and steps
The standard process for sustainable merch procurement runs as follows. Identify which environmental claims the buyer intends to make. Identify the supplier's evidence for each claim. Confirm the supplier's certifications are current. Confirm the supplier's transaction certificates cover the buyer's purchase. Document the claim-evidence chain. Conduct a mid-year review of environmental claims for accuracy.
Case study
A UK financial-services firm ran a conference programme with 600 delegate packs combining organic cotton apparel, recycled-paper notebook and FSC certified packaging. The supplier provided a GOTS transaction certificate covering the buyer's purchase and a current FSC chain-of-custody certificate with the FSC licence number. The ASA received no complaint.
Compliance and certifications
Sustainability-claim compliance sits on top of VAT, UK GDPR, Modern Slavery Act 2015, product safety, EPR / Plastic Packaging Tax. The supplier-side certifications most commonly seen on UK sustainable merch are GOTS, GRS, OEKO-TEX Standard 100, Bluesign, FSC, B Corp, Cradle to Cradle Certified and the Carbon Trust certification. The CMA's enforcement powers have been used recently against false-green-claims in adjacent industries.
Comparison with other solutions
Compared with catalogue-based promotional product distributors, dedicated UK merch suppliers bring higher transparency on the sustainability evidence chain. Catalogue distributors often aggregate supply from many sources and the sustainability-claim evidence is harder to verify.
Program lifecycle
A typical UK sustainable merch programme runs from brief to closure in 4–8 weeks. Repeat programmes use the existing supplier roster and run on the standard timeline. New certified suppliers are onboarded once with the full sustainability evidence chain.
Closing note
Sustainable merch claims in the UK are governed by the CMA Green Claims Code, the ASA's environmental-claims code, the Plastic Packaging Tax, the EPR regime, the Modern Slavery Act 2015 and the corporate climate-disclosure obligations. The buyer-side discipline is to make specific, substantiated claims and to maintain ongoing evidence.
Talk to a sustainability advisor
For a UK B2B merch programme that aligns the supplier's evidence with the buyer's marketing claims and the relevant corporate-disclosure obligations, send the brief through the form below.