UK OEM procurement faces a crunch in compliance regulation. With CBAM beginning in 2027, then EPR reporting starting in 2026, and Scope 3 disclosure requirements already being mandatory under IFRS S2, companies need to be hyper-aware of what they need to be on top of. What's the cost of inaction for not being vigilant? Companies might expect 5-15% erosion in margins in carbon-exposed categories. There is a silver lining though: companies can transform the regulatory pressure that's occurring in the current business landscape into competitive advantage.
The sustainability agenda is no longer a future aspiration as a 'fuzzy' nice-to-have for the company boardrooms, it's now become an operational challenge that needs to be addressed throughout the business. Waste in packaging, Scope 3 data gaps, and carbon-linked freight costs have become additional pressures on budgets and production. But let's look at that silver lining again: these same pressures can create opportunities and a forcing function for tighter inventory control, streamlined supplier approval, and packaging redesigns that cut both costs and carbon.
For many businesses, Scope 3 emissions account for more than 70% of their carbon footprint (Deloitte UK). While UK organisations currently report Scope 1 and 2, Scope 3 is on the fast track to becoming mandatory under IFRS S2 climate-related disclosures and TPT (Transition Plan Taskforce) frameworks.
Along with this, the Carbon Border Adjustment Mechanism (UK CBAM) will apply from the start of 2027 (UK GOV factsheet). This is particularly pertinent to OEM manufacturers who work with iron and steel materials (check the factsheet for a full proposed criteria list). Consumables and packaging are increasingly on the radar alongside carbon (Plastic Packaging Tax continues to rise). All these increased environmental concerns, compliances and concurrent legislative creep directly impacts procurement procedures and budgets.
We've assessed the key issues around supply chain sustainability and the regulatory compliances that need to be addressed now to aid procurement leaders in translating sustainability goals into operational wins.
From Compliance to Competitive Advantage
Transition Plans
Does procurement need transition planning?
Yes. Transition planning needs to be taken seriously by manufacturers. The Transition Plan Taskforce (TPT) framework expects manufacturers to develop credible pathways to net zero, covering governance, capital allocation, and Scope 1–3 reduction milestones. Plans need to be published for full assessment and compliance checks so they can be scrutinised. Broad commitments aren't enough anymore. Investors and the Government are looking for black and white evidence.
A robust plan should set out tangible projects and pathways. These could include larger scale low-carbon logistics strategies, to energy-efficient warehousing upgrades, with more tactical interventions such as packaging redesign to minimise use. Companies should consider quantified KPIs, governance structures with board oversight, and risk analysis addressing and monitoring this area.
A harder challenge is to move these requirements down the supply chain. If not already doing so, manufacturers need to embed sustainability clauses into tenders and supplier scorecards, ensuring partners also align with your net zero roadmap.
At Acorn we support our service clients by integrating sustainability checkpoints into service reviews, helping credible progress to be made throughout their supply chain.
"Failure to prepare could erode competitiveness by 5–15% in carbon-exposed categories."
Preparing for CBAM
How do manufacturers address this area?
The UK Carbon Border Adjustment Mechanism (CBAM) will take effect in 2027. It covers carbon-intensive imports such as steel, aluminium, fertilisers and electricity. For OEMs reliant on these materials, CBAM will directly raise the costs and resources needed to be deployed to gather emissions evidence and to comply and limit exposure in this area.
Procurement leaders can do:
— Analyse exposure across imported materials using HS codes.
— Model financial impact using today’s ETS (UK Emissions Trading Scheme) price range (~£41 tCO₂e), then stress-test for volatility.
— Include emissions data sharing and supplier assurances in contracts.
— Diversify sourcing by using supplementary supply partners and additional channels that favour lower-carbon producers or local alternatives.
The risk of inaction is clear cut: failure to prepare could erode competitiveness by 5–15% in carbon-exposed categories. OEMs who act now have the opportunity to place themselves in position of strength, strategise for exposure, and demonstrate their credentials to both boards and customers.
Acorn works with you to enable supplier emissions checks in procurement workflows. We provide the logistics infrastructure and services (including our VMI, direct line feed, and energy-efficient warehousing) that strengthens the credibility of your CBAM response.
EPR (Extended Producer Responsibility)
What do OEM procurement leaders need to do about packaging?
The UK’s Extended Producer Responsibility (EPR) scheme fundamentally changes who is accountable for packaging. Responsibility lies with the business that places packaged goods on the UK market.
For OEMs, that usually means both:
— Custom packaging applied to advanced products, assemblies, or spare parts.
— Imported packaging that arrives with components or sub-assemblies (because the OEM becomes the obligated producer once those goods are sold in the UK).
Buying packaging from a UK packaging producer does not shift the obligation. The supplier is only responsible when they sell packaging for their own products. Once an OEM applies that packaging to its goods, or imports goods already packaged, the liability sits with the OEM (if they meet the tonnage requirements for compliance activation).
Obligated producers need to capture detailed 'nation data' for all packaging: material type, weight, recycled content, and which UK nation it will be discarded in. This, along with self-managed waste reporting is currently due for reporting in 2026.
For procurement leaders, this is more than an administrative exercise. It reshapes packaging design decisions, supplier management, and even brand reputation. Companies need to have audit-ready compliance, and penalties for non-submission are hefty.
Action points for OEMs:
— Check if you need to take action and assign a packaging compliance lead in procurement.
— Configure ERP/WMS systems to track both custom packaging and imported packaging.
— Demand standardised packaging declarations from suppliers at the quotation stage. Work with supply chain partners who are actively working toward best practices in this area.
— Implement pilot reporting through 2025 to stress-test data before the first live submission.
Acorn can ensure EPR compliance is not a bolt-on burden but a natural outcome of disciplined, forward-looking procurement. We work with OEM clients to provide custom packaging and recycled material options to minimise use and provide environmentally-friendly outcomes.
Cost Reduction Through Circularity
Packaging & Reverse Logistics
Where are the quickest sustainability wins?
OEMs need to find wins across the whole product life cycle and supply chain to decarbonise their operations and product portfolio. Lightweighting and mono-materials can reduce environmental impact, along with carbon costs when done right. Choosing the right materials within your assembly process and final product for recyclability and re-use is paramount. Packaging can be a risk factor if it's not protective in the right way for specialist precision parts and assemblies.
— Closed-loop reverse logistics, capturing packaging back from distributors or service sites, ensures high-value cases and pallets are reused, and not discarded and trashed.
— Lightweighting and mono-materials can deliver both cost and carbon savings, keep compliance with the Plastic Packaging Tax and other environmental compliance requirements.
— Reusable transit pallets, boxes, and kitting cases can cut packaging waste by a significant percentage (WRAP), while protecting critical sub-assemblies from damage.
—Data feedback loops from returns and damage analysis feed directly into packaging redesign, closing the loop and turning re-use and sustainability into a selling point rather than a liability.
Acorn integrates packaging and re-use requirements into supplier evaluation and approval processes, ensuring we work with your sustainability metrics and needs. Custom kitting and assembly packages are some of the ways we help clients. We can also collaborate with you on product design and assembly to get the most out of your supply chain and enhance both recyclability and sustainability. For OEM procurement leaders, this makes it less about compliance and more about planning for positive leverage in cost control, resilience, and customer credibility.
Inventory & Obsolescence
How do smarter inventory practices cut waste?
For manufacturers of complex engineered systems, unmanaged inventory leads to high waste and tied-up working capital. High value components need to be used effectively without wastage. Depending on the industry, 10–30% of industrial inventory can become obsolete in unmanaged supply chains, with the main danger being incoming componentry that is over-ordered, different to required current specifications, or deprecated due to production changes.
Further research from McKinsey suggests that demand planning using historic company data and AI-enabled inventory management can cut inventory costs by 20–30% and may reduce forecast error by up to 50%. This directly improves operations resilience and cash flow.
A robust approach to achieve gains may combine these three areas (all of which Acorn implement):
— Vendor Managed Inventory (VMI): Shift replenishment to trusted suppliers with shared demand data. Dampen the bullwhip 'ripple' effect, cut variability and reduce obsolescence.
— Real-time scanning and dashboards: Surface slow-moving stock early, working with ordering and storage to make proactive interventions.
— Strict FIFO (first in first out) and shelf-life control: Ensure finite-life or revision-sensitive components are consumed in sequence, reducing scrap.
OEMs need partners who can embed scanning, kitting and FIFO discipline into their supply base, and use the latest technologies to provide the best inventory practices and delivery. Acorn has a near zero uptime record for supplying client production lines, and our services support you by integrating VMI, direct-line-feed (DLF), and scan-enabled picking and packing, kitting and sub-assembly, into daily operations.
Energy-Efficient Warehousing
How does warehousing use fit into sustainability strategies?
Warehousing is often overlooked in sustainability planning, but it contributes a significant part of Scope 2 and Scope 3 emissions. In many facilities, lighting and HVAC together account for two-thirds to three-quarters of total energy use. Rising energy costs add up.
For OEMs manufacturers available on-site space is always a premium, and using it for high value assembly rather than inefficient storage and inventory stocking should almost always be the aim. Outsourcing to a trusted provider who is concentrated on and experienced in optimising inventory storage and delivery offers a sweet spot.
Measures to maximise warehouse efficiency:
— LED retrofits and smart controls. These can cut lighting energy usage by 70–90% while also reducing maintenance.
— Racking optimisation: improves airflow and reduces HVAC demand. It also frees floor space for core production operations.
— Electric handling equipment: lowers carbon footprint versus diesel or LPG alternatives and strengthens ESG compliance.
— Building management systems and renewables: optimise use, along with providing long-term decarbonisation pathways.
One of our core strengths: Acorn build energy efficiency into our services and supply chain operations. By outsourcing, clients reduce carbon exposure, reclaim production space, and demonstrate verifiable sustainability progress to both boards and customers.
"Sustainability is now both a compliance necessity and a competitive advantage. Procurement leaders who act early will not only control costs but also strengthen their OEM partnerships and brand reputation."
Data-Driven Decision Making
Scope 3 Data Accuracy
How accurate must Scope 3 reporting be?
Scope 3 emissions (those that don't directly result from company's own operations, but upstream and downstream) typically account for over 70-80% of a manufacturer’s carbon footprint (McKinsey). This means the bulk of climate exposure lies in the supply base for OEMs, not your own factory. But they are harder to ringfence and track accurately.
Yet accuracy matters.
Investors, regulators, and OEM customers are no longer accepting broad averages or spend-based calculations. In fact, recent reports show over 46 of the FTSE 100 have been forced to restate climate disclosures due to unreliable Scope 3 data, undermining board credibility and slowing access to green finance (The Times).
What can OEMs do about this?
— Target high-impact categories first (steel, electronics, logistics), where errors carry the greatest financial and reputational risk.
— Mandate supplier-specific data in contracts and tenders; emission factors should only be fallback options.
— Document and disclose assumptions clearly. Boards and auditors increasingly demand transparent justifications.
— Show progressive improvement year-on-year. The benchmark isn't perfection, but continuous enhancement.
Acorn as a master supplier can work with you to deliver the best traceability and sources of componentry that contribute to your sustainability goals, and are forward looking in their reporting.
Freight & UK ETS
How will ETS expansion affect logistics costs?
The UK Government has confirmed that the UK Emissions Trading Scheme (ETS) will extend to cover domestic maritime from 2026, with road freight under active review (ICAP).
For OEMs moving heavy and high-value equipment the carbon costs of this could be significant, and will flow directly into freight invoices as carriers pass through surcharges. In terms of procurement and delivery, it has the potential to become a a strategic risk to competitiveness. Rising freight costs can erode margins, affect global tender pricing, and expose OEM boards to extra scrutiny on Scope 3 disclosures.
Action priorities:
— Model exposure now: stress-test logistics budgets against current ETS prices.
— Consolidate and redesign shipments: fewer, fuller loads reduce both carbon intensity and cost exposure.
— Build emissions KPIs into contracts.
— Scenario plan for road freight inclusion: prepare procurement playbooks before the policy moves from consultation to enforcement.
Acorn work holistically with you to provide low-carbon logistics, and can work on both delivery and reverse logistics scheduling to help meet your targets and reporting needs.
Supplier-related standards
Integrating sustainability into supplier approval and procurement
Supplier approval has traditionally focused on quality, cost, and delivery. But sustainability is now a fourth consideration. Investor scrutiny, customer expectations, and increasing national and international regulations such as IFRS S2 and the UK’s Modern Slavery Act are driving provenance, traceability and accountability into supplier operations.
Baseline requirements now include:
— ISO 14001 certification for environmental management.
— Modern slavery and human rights compliance.
— Credible emissions data for Scope 3 reporting and transition plans (IFRS S2 disclosures)
Companies should apply a sense of proportionality: deep assessments on high-risk, high-spend categories (such as steel, electronics, specialist machining), while enacting lighter-touch checks for low-risk consumables. Supplier scorecards can keep sustainability criteria live, ensuring performance improves over time without introducing bottlenecks.
Integrating sustainability into supplier approvals matters strategically for OEMs, enabling compliance risk reduction, strengthening tender credibility, and driving the rationalisation of supply base around progressive and responsible partners.
At Acorn we embed ISO, ethical compliance and and sustainability standards into our 'business as usual'. This allows our OEM clients to enhance credentials in these areas while still being able to move fast on procurement and maintain audit-ready assurance and supplier credibility.
Digital Reporting Tools
How can digital tools reduce reporting burden?
Reporting for IFRS S2 and CSRD (the EU Corporate Sustainability Reporting Directive), promotes sustainable practices, operations and investments, and needs to be built into ongoing procurement and logistics operations. Manual spreadsheets won't cut it anymore. Capturing this data as default should be the goal being worked toward.
ERP-integrated dashboards and warehouse systems can automate the capture process for reporting. Implementation of supplier scorecards on packaging, freight and emissions data can provide data at the purchase order stage. This not only improves accuracy but illustrates audit trails to satisfy regulators and investors.
Advanced adopters are piloting blockchain traceability for material origins to enable verifiable records of material origins and recycled content. OEMs should track and decide when and if these are usable and viable for their operations.
Sustainability is now both a compliance necessity and a competitive advantage in our current sophisticated manufacturing era (see our Industry 5.0 article). Procurement leaders who act early stay ahead of regulations, tender requirements, and board expectations. If your OEM wants to work with a logistics service provider that can delivery near zero line-down performance with lower carbon burden, then Acorn is the right partner for you.
Build a sustainable supply chain with Acorn
Sustainability is a serious consideration in modern business. Move from looking upon it as a burden to operations and more as a means to competitive advantage and good business.
We embed sustainable and ethical practices into every part of our business at Acorn. Our services help you to meet your objectives in this area.
