The UK Sustainability Reporting Standards (UK SRS) Explained

The UK SRS are now official: Here's why it matters

After months of consultation, exposure drafts, and technical review, the Department for Business and Trade made it official on 25 Februrary 2026: the UK Sustainability Reporting Standards (UK SRS) are published. The UK SRS establishes a coherent, globally aligned framework for how companies disclose sustainability-related financial information—replacing the patchwork of TCFD requirements, SECR obligations, and voluntary frameworks that have defined UK reporting for years.

What are the UK Sustainability Reporting Standards?

The UK SRS are the UK government's endorsed versions of the International Sustainability Standards Board's (ISSB) global baseline standards.

• UK SRS S1 — General Requirements for Disclosure of Sustainability-Related Financial Information. This establishes the overarching framework, requiring entities to disclose material sustainability-related risks and opportunities that could affect their cash flows, access to finance, or cost of capital.
• UK SRS S2 — Climate-Related Disclosures. This focuses specifically on climate — physical and transition risks, opportunities, GHG emissions (Scopes 1, 2, and 3), scenario analysis, and transition planning. It integrates and supersedes the now-disbanded Task Force on Climate-related Financial Disclosures (TCFD), which fulfilled its remit and closed in October 2023.

Both standards use a financial materiality lens, meaning you disclose what matters to investors and your financial performance, not every sustainability issue your organisation touches. This distinguishes the UK SRS from the EU's Corporate Sustainability Reporting Directive (CSRD), which uses a broader double-materiality approach covering both financial and societal impact.

What's new: Key developments from February 2026

If you've been tracking the UK SRS since the consultation closed in September 2025, here's what the finalised standards confirm and what has moved since then:

The standards are now published and available for voluntary use. The government has formally endorsed IFRS S1 and S2 with minor UK-specific amendments, following recommendations from the UK's Technical Advisory Committee.

Mandatory reporting is coming. The original blog post you may have seen referenced a January 2026 application date. That figure was from the exposure draft consultation. The confirmed pathway is now:

• Now–20 March 2026: The Financial Conduct Authority (FCA) consultation (CP26/5) is open, proposing mandatory UK SRS-aligned reporting for listed companies. This is your window to respond and shape the final rules.

• Autumn 2026: FCA expected to publish final rules (subject to the finalised standards).

• 1 January 2027: Proposed start date for mandatory UK SRS S2 (climate) reporting for in-scope listed companies under the new UK Listing Rules.

Scope 3 gets a comply-or-explain runway. Under the FCA's proposals, Scope 3 emissions data would be reported on a comply-or-explain basis, with a one-year transitional relief. Broader UK SRS S1 (general sustainability) disclosures would carry a two-year transitional relief.

A new assurance regime is taking shape. The Financial Reporting Council has been asked to establish an interim register of sustainability assurance practitioners by mid-2026. The relevant assurance standard, ISSA (UK) 5000, will be effective for sustainability information reported for periods beginning on or after 15 December 2026. If your reporting processes aren't audit-ready, now is the time to fix that.

The "climate-first" phased approach is confirmed. Companies can phase in non-climate sustainability disclosures (UK SRS S1) after climate-related ones (UK SRS S2), giving organisations a practical on-ramp.

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👉 For a deeper dive into the UK Sustainability Reporting Standards, check out our on-demand webinar Decoding UK SRS. We walk through governance expectations, data gaps, and operational readiness under the new standards.‍

Who does the UK SRS apply to?

The mandatory scope is still being finalised, but the FCA's current proposals target companies already subject to TCFD-aligned requirements under the existing UK Listing Rules, specifically:

• Companies in the commercial companies, transition, non-equity shares, and non-voting equity shares listing categories
• Large listed UK companies (aligning with existing reporting thresholds)

For international companies with a primary listing outside the UK, the FCA is proposing a lighter-touch approach: disclose which sustainability reporting requirements apply in your home jurisdiction, or which standards you voluntarily follow. Large private companies and LLPs are expected to be addressed in a separate government consultation.

The four disclosure pillars

Whether you're reporting voluntarily this year or preparing for mandatory compliance in 2027, the UK SRS is structured around four disclosure areas inherited from TCFD but now significantly expanded:

1. Governance: How does your board oversee climate and sustainability risks and opportunities? Who is accountable, and how is that accountability documented?

2. Strategy: How do climate and sustainability risks and opportunities affect your business model, strategy, and financial planning over the short, medium, and long term?

3. Risk Management: How do you identify, assess, prioritise, and manage these risks? How does this integrate with your overall enterprise risk framework?

4. Metrics and Targets: GHG emissions (Scopes 1, 2, and 3 where material), climate scenario analysis, transition plan progress, and relevant KPIs.

The shift from TCFD to UK SRS isn't merely cosmetic. UK SRS demands more rigour on scenario analysis, more explicit linkage between sustainability data and financial performance, and a greater level of specificity on transition planning.

What happens to TCFD and SECR?

SECR and UK SRS remain separate obligations for now, and it is worth being precise about what each requires because the overlap is significant even if the scope differs. The Streamlined Energy and Carbon Reporting (SECR), introduced in 2019, requires qualifying large companies to report UK energy use, Scope 1 and 2 greenhouse gas emissions, and an intensity metric in their annual reports. It was designed as a disclosure mechanism rather than a framework for forward-looking climate risk assessment. UK SRS goes considerably further, requiring governance disclosures, scenario analysis, risk and opportunity assessment, and quantified financial impacts alongside the metrics SECR captures.

The most important practical implication is consistency. Your SECR emissions data and your UK SRS disclosures cannot contradict each other. They draw on the same underlying measurement systems, and any divergence will be visible to auditors and investors. Build your emissions measurement processes once, to UK SRS quality, and use that single source to satisfy both obligations.

How to prepare for UK SRS

1. Conduct a gap assessment against UK SRS S1 and S2

Map your existing disclosures (whether TCFD, SECR, or voluntary) against the UK SRS pillars. Identify where your data, governance structures, and narrative disclosures fall short. Pay particular attention to Scope 3 emissions coverage, scenario analysis methodology, and board-level accountability documentation.

2. Get your emissions data house in order

UK SRS S2 requires GHG emissions disclosure across Scopes 1, 2, and material Scope 3 categories. If your Scope 3 inventory is incomplete, estimated from industry averages, or not regularly updated, that needs to change. Align your measurement methodology with recognised standards such as the GHG Protocol and ISO 14064, and build the audit trails that assurance providers will scrutinise.

3. Embed sustainability into financial planning

UK SRS is fundamentally about financial materiality. Sustainability risks and opportunities need to be integrated into your financial forecasting, capital allocation decisions, and investor communications, not siloed in a standalone ESG report. This is a structural shift that requires cross-functional alignment between sustainability, finance, and the board.

4. Strengthen governance and accountability

Document who oversees what. Board-level sustainability oversight needs to be explicit, evidenced, and described in a way that satisfies both auditors and investors. This means board skills matrices, defined escalation processes, and clear links between sustainability KPIs and executive remuneration where relevant.

5. Plan for assurance now, not later

With the FRC's assurance practitioner register being established by mid-2026, third-party assurance is moving from nice-to-have to expected. Run an internal audit-readiness review: Are your data controls documented? Is your methodology consistent and replicable? Could an external reviewer follow your data from source to disclosure?

6. Consider voluntary disclosure as a competitive move

Companies that voluntarily report against UK SRS in 2026 will be ahead of their peers when mandatory requirements land. Early adopters strengthen investor confidence, surface strategic insights that reactive compliance doesn't, and demonstrate the kind of organisational readiness that procurement teams and capital markets increasingly reward.

UK SRS vs. global frameworks: Where does it sit?

The UK SRS positions the UK within the growing cohort of over 30 jurisdictions adopting ISSB-aligned standards, including Australia, Canada, Japan, Singapore, and Hong Kong. This global alignment matters for multinational companies tired of filing multiple, slightly incompatible disclosures for different markets.

It also sets the UK apart from the EU's CSRD trajectory. While the EU has recently been under pressure to dilute some CSRD requirements, the UK is taking a more targeted, financially-focused approach. Companies operating across both jurisdictions need to understand where the frameworks diverge, particularly on double materiality.

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Frequently Asked Questions

Are the UK SRS mandatory now?

‍No. As of publication (25 February 2026), the UK SRS are available for voluntary use. Mandatory requirements are subject to the FCA's finalised rules, expected Autumn 2026, and are anticipated to apply from January 2027.

What is the difference between UK SRS and TCFD?

‍The TCFD framework was disbanded in October 2023 after the ISSB — which TCFD's work directly informed — published its own standards. UK SRS S2 integrates and supersedes TCFD recommendations, using the same four-pillar structure (governance, strategy, risk management, metrics and targets) but requiring significantly more granular disclosure, including more detailed scenario analysis, Scope 3 emissions, and explicit transition planning.

What is the difference between UK SRS and CSRD?

‍Both are sustainability reporting frameworks, but they differ fundamentally in scope. The EU's CSRD uses a double-materiality approach, requiring companies to disclose both how sustainability issues affect their financial performance and how the company affects people and the planet. UK SRS focuses on financial materiality only: what affects investors and financial performance. Companies operating in both jurisdictions will need to understand these differences carefully.

What assurance is required under the UK SRS?

‍Third-party assurance requirements are still being developed. The FCA is seeking views on mandatory assurance as part of its current consultation. The FRC is establishing an interim register of sustainability assurance practitioners by mid-2026. The relevant assurance standard, ISSA (UK) 5000, applies to sustainability information for periods beginning on or after 15 December 2026. Organisations should prepare audit-ready documentation now.

How do the UK SRS affect supply chains?

‍While smaller companies in supply chains may not face direct reporting obligations initially, the data collection burden from in-scope companies will flow downstream. Suppliers and procurement partners should anticipate requests for emissions data, climate risk assessments, and transition plan information from larger customers preparing their own UK SRS disclosures.

Zevero helps organisations build the data infrastructure, measurement capability, and reporting governance needed to get UK SRS-ready — whether you're starting from scratch or building on existing TCFD or SECR foundations. Speak with our team to find out where your organisation stands.