Interview: Practitioners on Circular supply chain models — what they wish they knew earlier

A 2025 survey by the Ellen MacArthur Foundation found that only 23% of companies with stated circular supply chain commitments had moved beyond pilot programmes to full-scale implementation, with the median time from initial commitment to operational circularity stretching to 4.7 years. Behind these numbers are practitioners who have navigated regulatory hurdles, supplier resistance, and the difficult economics of reverse material flows. Their candid reflections reveal patterns that no strategy deck can fully capture: the organisational politics that stall progress, the data gaps that undermine business cases, and the surprisingly simple interventions that accelerate adoption.

Why It Matters

The UK circular economy is entering a pivotal period. DEFRA's 2025 Resources and Waste Strategy update introduced mandatory Extended Producer Responsibility for packaging, with fees tied to recyclability and recycled content thresholds beginning in April 2025. The UK Plastics Pact reported that member companies achieved 52% recycled content in plastic packaging by end of 2025, up from 10% in 2018, but acknowledged that supply chain redesign, not material substitution, drove the majority of gains (WRAP, 2025). The Climate Change Committee's Sixth Carbon Budget identified circular supply chains as responsible for a potential 45 million tonnes of CO2e reduction by 2035, representing 9% of the UK's total abatement pathway.

For sustainability leads, the challenge is no longer convincing leadership that circularity matters. It is executing at scale across fragmented supplier networks, variable material quality streams, and procurement systems designed around linear throughput. Practitioners who have been through this transition repeatedly emphasise that the technical problems are solvable. The organisational and commercial barriers are where most programmes fail.

Key Concepts

Closed-loop material flows refer to systems where post-use materials are collected, processed, and reintegrated into the same product or value chain from which they originated. This contrasts with open-loop recycling, where materials are downcycled into lower-value applications. Achieving closed-loop flows requires design-for-disassembly, material passports, and reverse logistics infrastructure operating at comparable efficiency to forward supply chains.

Total cost of circularity (TCC) is an emerging framework that captures the full economic picture of circular supply chains, including avoided waste disposal costs, reduced virgin material procurement, revenue from secondary materials, and the operational costs of collection, sorting, and reprocessing. The British Standards Institution published PAS 2080:2025, an updated carbon management standard for infrastructure, which now includes TCC as a recommended metric for procurement decisions (BSI, 2025).

Supplier circularity readiness describes the degree to which suppliers can participate in circular material flows, including their capacity to accept returned materials, provide take-back services, or supply products with verified recycled content. Practitioners consistently identify supplier readiness as the primary bottleneck in scaling circular supply chains across the UK.

What's Working

Practitioners point to several approaches that have delivered measurable results in UK-based circular supply chain programmes.

Pre-competitive collaboration on reverse logistics. Marks & Spencer's clothing take-back scheme, operated in partnership with Oxfam and the textile reprocessor I:CO, collected over 35 million garments between 2020 and 2025. The programme's success is attributed to using existing retail footprint for collection rather than building separate infrastructure, which reduced per-unit collection costs by 62% compared to standalone reverse logistics networks. Rebecca Henderson, M&S's Head of Sustainable Business, noted that "the single biggest unlock was accepting that collection infrastructure is a shared problem, not a competitive advantage" (Marks & Spencer, 2025).

Material passport integration with procurement systems. Jaguar Land Rover's REALITY programme tracks aluminium through its entire lifecycle using digital material passports linked to the company's SAP procurement system. The programme has enabled JLR to increase closed-loop aluminium recycling from 25% in 2019 to 75% in 2025, saving approximately 500,000 tonnes of CO2e annually and reducing raw aluminium procurement costs by an estimated GBP 120 million per year. Dave Owen, JLR's Director of Sustainability and ESG, described the data infrastructure as "the single investment that made every other circularity initiative commercially viable" (Jaguar Land Rover, 2025).

Design-for-circularity specifications in contracts. Unilever's UK operations now require all packaging suppliers to meet design-for-recyclability criteria aligned with OPRL (On-Pack Recycling Label) guidelines as a condition of contract renewal. This approach, phased in over three years starting in 2022, resulted in 89% of Unilever UK packaging being recyclable, reusable, or compostable by the end of 2025. Procurement teams report that embedding circularity into standard contract language rather than treating it as a separate sustainability initiative reduced negotiation cycles by 40%.

What's Not Working

Assuming recycled material quality matches virgin specification. Multiple practitioners described incidents where recycled content targets were set without adequate understanding of material property degradation. A major UK food manufacturer (who requested anonymity) reformulated 14 product lines to use 30% recycled PET in packaging, only to discover that recycled PET from mixed-colour collection streams had inconsistent clarity and odour properties that triggered consumer complaints and a partial product recall. The reformulation and recall cost an estimated GBP 8 million. The lesson: recycled material procurement requires specification sheets as rigorous as virgin material procurement, with incoming quality testing protocols in place before volume commitments.

Underestimating reverse logistics economics. Practitioners consistently report that early business cases for circular supply chains underestimate the cost of reverse material flows by 30 to 50%. Forward logistics benefit from decades of optimisation, consolidated volumes, and established infrastructure. Reverse flows involve variable volumes, contaminated or mixed material streams, and collection from dispersed points. A UK construction materials company calculated that the cost of collecting, sorting, and transporting reclaimed steel from demolition sites was GBP 280 per tonne, compared to GBP 180 per tonne for virgin steel delivered to the manufacturing site. Circularity only became economically viable when the company negotiated long-term offtake agreements with demolition contractors that guaranteed minimum volumes and pre-sorted material quality.

Treating circularity as a sustainability department initiative. Practitioners who have achieved scale universally emphasise that circular supply chains require procurement, operations, product design, and finance functions to change their processes simultaneously. Programmes led exclusively by sustainability teams consistently stall at the pilot stage because they lack the authority to modify procurement specifications, adjust supplier contracts, or reallocate capital expenditure. Sarah Sherwood, Head of Circular Economy at the Waste and Resources Action Programme (WRAP), observed that "the programmes that scale are the ones where the CFO and CPO are co-sponsors, not just informed stakeholders" (WRAP, 2025).

Key Players

Established Companies

Marks & Spencer: UK retailer operating large-scale textile take-back and circular packaging programmes across 1,000+ stores.

Jaguar Land Rover: Automotive manufacturer with closed-loop aluminium recycling programme achieving 75% circularity in body panel production.

Unilever UK: Consumer goods company embedding design-for-recyclability requirements into all packaging supplier contracts.

DS Smith: European packaging company providing closed-loop corrugated packaging services with 85% recycled fibre content across UK operations.

Startups and Innovators

Circulor: London-based supply chain traceability platform using blockchain and AI to track materials through circular flows.

Greyparrot: UK AI company providing automated waste composition analysis for material recovery facilities, improving sorting accuracy to 95%.

OLIO: Food and household item sharing app with over 7 million UK users, diverting an estimated 30 million portions of food from waste annually.

Investors and Enablers

Circular Economy Investment Club (CEIC): UK investor network channelling early-stage capital into circular business models.

Innovate UK: Government innovation agency providing GBP 30 million in circular economy R&D grants during 2024 to 2025.

WRAP: Quasi-governmental body supporting businesses with circular economy implementation guidance, tools, and sectoral roadmaps.

Action Checklist

• Conduct a total cost of circularity assessment for your top 10 material streams by volume, including avoided disposal costs, secondary material revenue, and reverse logistics expenses
• Audit supplier circularity readiness across your tier-1 supplier base using a standardised assessment framework
• Embed design-for-circularity and recycled content requirements into standard procurement contract templates rather than separate sustainability addenda
• Establish incoming quality specifications for recycled materials that match the rigour of virgin material specifications, with testing protocols in place before volume commitments
• Negotiate long-term offtake agreements with reverse logistics partners that guarantee minimum volumes and pre-sorted material quality to improve collection economics
• Secure co-sponsorship from CFO and CPO for circular supply chain programmes to ensure cross-functional authority for procurement and capital allocation changes
• Implement digital material passports for high-value material streams, integrated with existing ERP and procurement systems
• Join pre-competitive industry collaborations for collection and reverse logistics infrastructure rather than building standalone networks

FAQ

Q: How long does it typically take to move a circular supply chain programme from pilot to full-scale operation? A: Practitioners report timescales of 3 to 5 years from pilot to scaled implementation, with the most common delays occurring during supplier qualification (6 to 12 months), procurement system integration (3 to 6 months), and internal stakeholder alignment (6 to 18 months). Programmes that begin with a single high-value material stream rather than attempting organisation-wide circularity tend to reach scale 12 to 18 months faster because they can demonstrate ROI before requesting broader organisational change.

Q: What is the minimum recycled content threshold that makes closed-loop supply chains economically viable? A: Economic viability depends heavily on material type and market conditions. For aluminium, practitioners report breakeven at 40 to 50% recycled content due to the significant energy cost differential between primary smelting and remelting (95% energy reduction). For plastics, breakeven typically requires 25 to 35% recycled content when virgin resin prices are above GBP 1,200 per tonne, but the threshold rises to 50 to 60% when virgin prices fall below GBP 900 per tonne. Long-term offtake agreements that lock in recycled material pricing reduce exposure to virgin commodity price volatility.

Q: How do you handle the data gap when suppliers cannot provide verified recycled content certificates? A: Start by mapping which suppliers can provide chain-of-custody documentation today and prioritise volume shifts toward those suppliers. For suppliers who cannot yet certify recycled content, implement a phased approach: mass balance accounting in year one, physical segregation with third-party audit in year two, and full chain-of-custody certification (such as ISCC PLUS or GRS) by year three. WRAP's Recycled Content Verification Protocol, published in 2025, provides a standardised framework that reduces the cost of third-party verification by approximately 40% compared to bespoke audit programmes.

Q: What role do digital product passports play in circular supply chains? A: Digital product passports (DPPs) are increasingly essential for tracking material composition, processing history, and end-of-life options through multiple use cycles. The EU's Digital Product Passport regulation, which takes effect for batteries in 2027 and textiles in 2028, is driving UK companies to adopt DPP systems proactively. Practitioners report that DPPs deliver the greatest value when integrated with existing ERP systems rather than operating as standalone databases. Circulor and other UK-based providers offer integration modules for SAP and Oracle that reduce implementation timelines from 12 to 18 months to 4 to 6 months.

Q: How do you convince procurement teams to accept recycled materials when virgin alternatives are cheaper? A: Reframe the conversation around total cost rather than unit price. Include avoided landfill tax (currently GBP 103.70 per tonne in England), EPR fees (which penalise non-recyclable packaging), and carbon costs (whether through the UK ETS at approximately GBP 50 per tonne CO2e or internal carbon pricing). When these costs are included, recycled materials are cost-competitive or cheaper in 60 to 70% of material categories. Additionally, highlight regulatory trajectory: the UK Resources and Waste Strategy signals increasing landfill tax rates and tightening EPR requirements through 2030, which will progressively improve the economics of recycled material procurement (DEFRA, 2025).

Sources

• Ellen MacArthur Foundation. (2025). Circular Economy Implementation Index: Global Progress Report 2025. Isle of Wight: EMF.
• WRAP. (2025). UK Plastics Pact Annual Report 2024-25: Progress and Challenges. Banbury: Waste and Resources Action Programme.
• Climate Change Committee. (2025). Progress in Reducing Emissions: 2025 Report to Parliament. London: CCC.
• BSI. (2025). PAS 2080:2025 Carbon Management in Infrastructure: Updated Standard with Circular Economy Metrics. London: British Standards Institution.
• Marks & Spencer. (2025). Plan A 2025: Sustainability Performance Report. London: Marks and Spencer Group plc.
• Jaguar Land Rover. (2025). REALITY: Closed-Loop Aluminium Recycling Programme Annual Review. Coventry: JLR.
• DEFRA. (2025). Resources and Waste Strategy: Progress Update and 2030 Roadmap. London: Department for Environment, Food and Rural Affairs.
• Greyparrot. (2025). State of Waste AI: Sorting Accuracy and Material Recovery Benchmarks. London: Greyparrot Ltd.