Letter: Sustainability reporting matters beyond finance
Sustainability reporting often gets dismissed as a box-ticking exercise for fund managers and analysts. However, a recent intervention from Alice Sireyjol, Sustainable Finance Director at SWEN Capital Partners, challenges that narrow view. In her letter to the Financial Times, she argues that reliable sustainability information serves a much wider purpose. It helps people understand how companies affect the environment and society, how those issues might loop back to affect operations, and whether corporate promises are actually turning into results.
This matters particularly for UK businesses navigating parallel regulatory changes. While the EU's Corporate Sustainability Reporting Directive sets the pace in Europe, UK companies trading with EU partners face growing pressure to provide comparable data. Meanwhile, domestic requirements around climate disclosure, modern slavery statements and environmental permits are tightening. For many SMEs, sustainability reporting is shifting from optional extra to commercial necessity.
The question is no longer whether to report. It's what to report, how to make it credible, and who actually needs the information. Getting those answers right affects procurement, finance, recruitment and risk management. Consequently, understanding how the European framework is evolving offers practical lessons for UK businesses, regardless of whether they fall directly under CSRD rules.
Double materiality changes what counts as relevant information
Traditional financial reporting centres on assets, liabilities and risks that could affect enterprise value. Sustainability reporting widens the lens. It covers greenhouse gas emissions, biodiversity impacts, working conditions, human rights, resource use and relationships throughout the supply chain. Essentially, it asks companies to account for their wider footprint, not just their profit and loss.
The European framework uses a concept called double materiality. Companies must consider two distinct questions. First, how do sustainability issues affect the company's financial position and prospects? Second, how does the company affect people and the environment? Notably, these don't always align. An issue can be environmentally or socially significant long before it shows up as a financial risk.
Poor labour conditions in a supply chain might not appear on a balance sheet today. However, they can later trigger regulatory penalties, reputational damage, lost contracts or litigation. Similarly, ecosystem damage may seem distant from core operations until supply disruption, water scarcity or land-use restrictions force operational changes. Therefore, double materiality requires companies to look beyond immediate financial effects and consider impacts that could eventually circle back as commercial risks.
For UK SMEs, this matters because large customers and public sector buyers are starting to ask similar questions. Procurement frameworks increasingly require suppliers to demonstrate how they manage environmental and social impacts. A company that tracks only financial metrics may struggle to answer those questions convincingly.
How the European reporting framework developed in 2026
The Corporate Sustainability Reporting Directive entered a transitional phase last year. The European Commission adopted revised and simplified European Sustainability Reporting Standards on 3 July 2026. Those revised standards were published in the Official Journal on 21 September 2026. Companies reporting for 2026 could choose between the revised standards, the existing standards with earlier quick-fix amendments, or the existing standards with specified transitional reliefs.
The European Securities and Markets Authority urged companies to state clearly which version they used. That transparency matters because the revised framework substantially reduced reporting burdens. Legal analysis indicates that the changes cut the number of required data points by more than 70 per cent. Mandatory reporting under the amended CSRD now focuses on larger companies with more than 1,000 employees.
The simplification wasn't about lowering expectations. Instead, it placed greater emphasis on identifying what is genuinely material and reporting it clearly. ESMA advised companies to prepare to use the revised standards no later than the 2027 financial year. It also warned against presenting non-material information as though it were relevant, which clutters reports without adding value.
Meanwhile, ESMA's 2026 enforcement priorities called on companies to apply equal rigour to positive and negative impacts. Regulators want to see clear methodologies for materiality assessments. They also expect companies to consider both their own operations and their value chains. Furthermore, disclosures should explain the relationship between material impacts, risks and opportunities on one hand, and the policies, actions and targets intended to address them on the other.
This enforcement focus reinforces Sireyjol's central point. Reporting has value only when it helps readers understand what a company is doing, why it's doing it, and whether the results support its claims. Generic commitments don't meet that test.
What regulators expect from credible sustainability disclosures
Regulatory guidance offers a useful benchmark for assessing disclosure quality. A credible sustainability report should explain how material impacts, risks and opportunities were identified. It should cover relevant parts of the value chain, not just direct operations. Positive and negative impacts need to be distinguished clearly.
Sustainability risks should connect to specific policies, actions and financial resources. Targets need to be measurable, time-bound and outcome-oriented. Progress against those targets should be reported honestly, including missed or abandoned objectives. Changes in reporting boundaries, methodologies or baseline years require explanation. Finally, sustainability disclosures should remain consistent with financial statements, risk disclosures and public communications.
The emphasis on targets is particularly important. Many corporate objectives have 2030 deadlines. ESMA encouraged issuers to document the risk of failing to meet them. Therefore, a good sustainability report should make it possible to determine not only what a company promises, but also whether it's on course to deliver.
For UK businesses, these principles apply even outside the CSRD's formal scope. Supply chain due diligence, tender responses and environmental permit applications all demand similar rigour. A company that can demonstrate consistent, traceable and outcome-focused sustainability management has a commercial advantage. Conversely, vague commitments unsupported by evidence create reputational and contractual risk.
Reporting serves multiple audiences beyond investors
Sustainability information matters to more than just shareholders and lenders. Employees and prospective workers use it to assess working conditions, workforce policies, diversity commitments and whether an employer's stated values are credible. In tight labour markets, that affects recruitment and retention.
Customers and business partners increasingly need data about emissions, sourcing, labour practices and environmental impacts across supply chains. Smaller companies may be asked for sustainability information by larger customers, even when they aren't subject to mandatory reporting themselves. Public sector procurement frameworks now routinely require suppliers to demonstrate carbon measurement and reduction plans, particularly under rules like PPN 06/21.
Communities and civil society organisations use disclosures to evaluate a company's effects on local environments, human rights and social conditions. That scrutiny can influence planning permissions, licence renewals and community relations. Managers and boards use the reporting process to identify operational weaknesses, prepare for regulation and allocate capital toward transition plans.
The voluntary standard introduced alongside the revised European framework gives smaller companies a proportionate way to organise sustainability information. It also provides a recognised format for responding to requests from customers, lenders and investors. For UK SMEs, adopting a structured approach to sustainability data can reduce duplication when multiple stakeholders ask similar questions.
Shorter reports must still contain credible evidence
The 2026 reforms reflect a tension at the centre of sustainability regulation. Companies and policymakers want to reduce administrative costs, duplicated requests and excessive data collection. However, reducing disclosure must not make it easier for companies to obscure material impacts or make unsupported claims.
The answer isn't necessarily more data. It's better data. Information that is relevant, comparable, traceable and connected to decisions. A shorter report with clear evidence of emissions reductions, workforce outcomes, capital allocation and progress toward targets may be more useful than a longer document filled with generic commitments.
Regulators' focus on double materiality, value-chain coverage and consistency is therefore consequential. It moves sustainability reporting away from broad statements of intent and toward accountability for measurable outcomes. It also makes discrepancies between sustainability claims and financial, operational or risk disclosures easier to identify.
For example, a company claiming to prioritise decarbonisation should be able to show capital expenditure on energy efficiency, renewable energy contracts, or fleet electrification. If sustainability reports describe ambitious targets but financial filings show no corresponding investment, the disconnect becomes obvious. Similarly, workforce policies described in sustainability sections should align with employment data, turnover rates and legal compliance records.
Five facts UK businesses should note
- The European Commission reduced mandatory CSRD data points by more than 70 per cent in July 2026, focusing reporting requirements on companies with over 1,000 employees while introducing voluntary standards for smaller firms.
- Double materiality requires companies to consider both how sustainability issues affect financial performance and how the company affects people and the environment, even when those impacts don't yet show up as financial risks.
- ESMA's enforcement priorities emphasise equal rigour for positive and negative impacts, clear methodologies for materiality assessments, and consistency between sustainability disclosures and financial statements.
- UK companies trading with EU partners or supplying larger organisations face growing pressure to provide comparable sustainability data, regardless of whether they fall directly under CSRD rules.
- Credible sustainability reporting should connect material impacts to specific policies, measurable targets and evidence of progress, making it possible to assess whether stated ambitions are translating into action.
Practical considerations for UK SMEs navigating sustainability disclosure
Most UK small and medium businesses won't be directly subject to CSRD. Nevertheless, the principles behind the European framework are spreading through procurement requirements, supply chain requests and customer expectations. Understanding what good reporting looks like helps businesses respond efficiently when customers or partners ask for sustainability information.
Start by identifying which sustainability issues are material to your operations and supply chain. For manufacturers, that might include energy use, waste, water consumption and working conditions. For service businesses, it could involve employee wellbeing, travel emissions and data security. Materiality isn't about reporting everything. It's about focusing on issues that matter to your business and stakeholders.
Once you've identified material issues, connect them to measurable actions. A commitment to reduce carbon emissions needs supporting evidence such as energy audits, efficiency projects, renewable energy contracts or low-carbon transport policies. Workforce commitments should link to training programmes, pay data, retention rates and health and safety records. The connection between stated priorities and actual resource allocation is what makes reporting credible.
Consider how your sustainability data aligns with financial reporting and operational decisions. If you're investing in energy efficiency, that should appear in capital expenditure plans. If you're changing suppliers to reduce emissions, procurement records should reflect that shift. Consistency across different information sources builds confidence that sustainability commitments are genuine, not just marketing.
For businesses that need to respond to customer requests or tender requirements, our net-zero program for carbon reporting compliance provides structured support. It helps you measure emissions accurately, set credible targets and document progress in ways that meet procurement standards. Similarly, our compliance services for ESG reporting can help you navigate the growing landscape of disclosure requirements without duplicating effort.
Training also matters. Sustainability reporting isn't just a finance or operations task. It requires input from across the business, including procurement, HR, facilities management and senior leadership. SBS Academy training on sustainability reporting can help teams understand what information is needed, why it matters and how to collect it efficiently.
Where to find authoritative guidance on sustainability reporting
The Department for Energy Security and Net Zero publishes UK policy on climate and energy, including guidance relevant to corporate carbon reporting. The Financial Reporting Council provides standards and guidance on corporate reporting, including sustainability-related disclosures. The European Securities and Markets Authority publishes enforcement priorities and technical guidance on CSRD and ESRS for companies operating in European markets.
For businesses involved in public sector supply chains, the Cabinet Office guidance on PPN 06/21 explains carbon reduction plan requirements. The Institute of Environmental Management and Assessment offers professional guidance and training on environmental and sustainability management relevant to UK businesses.