UK SRS: Timeline, scope and what changes for UK businesses

What is UK SRS and why does it matter?

UK sustainability reporting is undergoing its most significant transformation in a decade. The UK Sustainability Reporting Standards (UK SRS) are the government’s formally endorsed framework for how companies disclose sustainability-related financial information to investors. Published on 25 February 2026 by the Department for Business and Trade, UK SRS will serve as the UK’s framework for sustainability disclosures, closely aligned with the ISSB’s standards, with the aim of strengthening sustainability reporting and providing investors and stakeholders with comparable, decision-useful information. ICAEW

Unlike previous regimes, UK SRS integrates sustainability risk directly into financial reporting, making it a concern for finance teams and boards, not just sustainability managers.

But compliance is the floor, not the ceiling. Companies that move early on UK SRS, particularly on Scope 3, are not just satisfying a regulator. They are building a verified map of their supply chain that most competitors do not yet have: which suppliers carry the highest transition risk, where energy cost exposure is concentrated, which procurement relationships are most vulnerable as carbon pricing tightens. That intelligence has real strategic value in procurement decisions, risk management, and investor conversations. The companies that will differentiate on sustainability are the ones treating UK SRS as an opportunity to get ahead, not a deadline to manage around.

For a broader introduction to how UK SRS affects your business this year, read our previous post: UK SRS: What It Means for Your Business in 2026.

Who is in scope?

Scope is one of the most common questions eco-shaper receives, and for some categories of business the answer is still being finalised.

Listed companies have the clearest picture. The FCA’s proposals apply to companies with a primary UK listing in the commercial, transition, and non-equity listing categories, around 515 issuers, who would be required to provide full UK SRS disclosures in their annual financial report. Companies with a secondary UK listing or depositary receipts face a lighter-touch transparency requirement, currently around 89 issuers. Passle The FCA has opted not to extend the proposals to closed-ended investment funds, shell companies, debt securities, securitised derivatives, or warrants and options.

Private companies will follow. The government has indicated it will consult separately on whether to introduce mandatory reporting requirements for other types of company through Companies Act reporting requirements, which could include high-turnover private limited companies with more than 500 employees and more than £500m turnover. That consultation will sit within the MCR programme expected later in 2026.

Businesses not directly in scope today should not assume they are unaffected. As large listed companies face mandatory Scope 3 value chain disclosures with increasing rigour and eventual assurance requirements, demand for high-quality supplier emissions data will intensify throughout supply chains. The IFRS Foundation’s guidance on IFRS S1 and S2 provides useful context for understanding how those upstream data requests will be framed.

The UK SRS timeline

On 25 February 2026, the UK Government endorsed IFRS S1 and S2 and issued the final versions of UK SRS S1 and S2 for voluntary use, following a public consultation that ran from June to September 2025. The standards are available for any UK entity to adopt immediately.

Mandatory requirements are being introduced in phases. The FCA’s Consultation Paper CP26/5, published on 30 January 2026, proposed aligning listed company disclosures with UK SRS from January 2027. That consultation closed on 20 March 2026. The FCA will now review responses and aims to publish a Policy Statement in autumn 2026, with the rules coming into force from 1 January 2027. Financial Conduct Authority

The proposed mandatory timeline for in-scope listed companies is:

What is still being decided on UK SRS?

Several important elements remain open. The government’s work on UK SRS sits within the context of the Modernising Corporate Reporting (MCR) programme, announced in October 2025, which will include consideration of the need for requirements within the Companies Act for private entities to report against UK SRS. GOV.UK A separate consultation on mandatory transition plan disclosures is also expected, and the assurance regime is still being finalised, with the FRC establishing an interim assurance practitioner register by mid-2026.

On the international dimension, the Joint EU-UK Financial Regulatory Forum met in London on 11 March 2026. The UK reported on its delivery of sustainable finance priorities, including finalising UK SRS and the FCA consultation, while both the EU and UK reaffirmed their commitment to promoting internationally consistent sustainable finance approaches and greater interoperability across regimes, particularly for cross-border firms. GOV.UK This is welcome news for multinationals navigating both UK SRS and the EU’s CSRD.

The UK government’s official UK SRS guidance page remains the definitive source as these consultations develop.

What changes from existing regulations?

From TCFD to UK SRS S2

For businesses with established TCFD processes, UK SRS S2 will feel structurally familiar. It uses the same four pillars of governance, strategy, risk management, and metrics and targets. However, compliance with UK SRS will require considerably more than existing TCFD-aligned reporting in several specific areas.

Scope 3 emissions were not required under TCFD. UK SRS S2 requires them, meaning most businesses need to build an entirely new data collection capability across their value chain. The FCA recognises this challenge and proposes that Scope 3 data would not be mandatory in the first year, moving to a “comply or explain” basis from 2028. The transitional relief is not a permanent exemption — it is a runway. Regulators and investors will expect a credible, time-bound plan for achieving full Scope 3 data capability, and assurance requirements on that data will tighten in subsequent years.

Financial quantification is now expected. TCFD allowed qualitative scenario analysis. UK SRS S2 requires companies to quantify the financial effects of climate risks and opportunities and link them directly to financial statement line items.

Transition plan disclosure is explicit. Companies must state whether a transition plan exists and where it can be found, or explain why one has not been produced.

Climate opportunities must be disclosed alongside risks. TCFD focused on downside risk. UK SRS S2 requires equal treatment of upside scenarios.

Connectivity to financial statements is mandatory. TCFD disclosures were often produced as standalone reports. That separation will not be sufficient under UK SRS.

An important practical clarification has also been confirmed: the government has clarified that UK SRS S2 qualifies as a national reporting framework under the Companies Act, meaning companies reporting in accordance with UK SRS S2 do not need to duplicate their disclosures to meet their existing obligations under section 414CB of the Companies Act, as long as the relevant requirements are met and the company references the use of UK SRS S2 in its statements. This removes a significant source of duplication anxiety for listed companies navigating the transition.

The FRC’s sustainability reporting FAQ sets out the practical implications of the TCFD to UK SRS transition in authoritative detail.

From SECR

SECR (Streamlined Energy and Carbon Reporting) requires large UK companies to report Scope 1 and 2 emissions and energy consumption in their directors’ reports. The FCA proposes to move companies to mandatory reporting against UK SRS S2, which covers climate disclosures and is an area where reporting is already high across listed companies on the basis of the existing TCFD “comply or explain” regime. Addleshaw Goddard SECR has no strategic, governance, or scenario analysis requirements, and the government has committed to reviewing how it interacts with UK SRS to reduce duplication. SECR is widely expected to be phased out or substantially revised as UK SRS becomes the primary mandatory framework, though no formal timeline has been confirmed. Companies currently relying on SECR alone should treat their existing disclosures as a starting point, not a destination.

The assurance dimension

This is where many businesses are most underprepared, and the expectations are moving fast. Assurance over UK SRS disclosures is not mandatory at this stage. However, companies will need to disclose whether third-party assurance has been obtained, including the name of the assurance provider, the scope of the engagement, the assurance standard applied, and a reference to the assurance opinion. BDO

Assurance providers should anticipate increasing demand for sustainability assurance in accordance with ISSA (UK) 5000, which is effective for assurance engagements on sustainability information reported for periods beginning on or after 15 December 2026. The FRC is establishing an interim register of sustainability assurance practitioners by mid-2026. The ICAEW’s analysis of the published UK SRS sets out what this means for preparers in detail. Even where assurance is not mandated, investor and board pressure to seek voluntary assurance will be strong from the first reporting year.

Practical gaps for companies already reporting

Even businesses with mature TCFD and SECR processes will have real gaps to close before UK SRS compliance. The most common eco-shaper identifies are:

Financial materiality integration. It is important to note that the UK SRS covers all aspects of sustainability, not just climate change, and once mandatory will require new areas of disclosure and greater depth of reporting, which will involve additional costs for business. Passle Sustainability risks and opportunities need to be integrated into financial forecasting, capital allocation decisions, and investor communications, not siloed in a standalone ESG report. Many organisations still treat sustainability reporting as a communications exercise rather than a financial disclosure obligation. That approach will not satisfy UK SRS.

Scope 3 data readiness. Scope 3 emissions reporting is among the most searched-for topics among UK sustainability teams right now, and with good reason. While a “comply or explain” relief applies from 2028, building Scope 3 capability takes time. The FRC has confirmed that Scope 3 GHG emissions and information about sustainability-related risks and opportunities beyond climate would be captured under a “comply or explain” approach under the FCA’s phased implementation from 1 January 2027. Financial Reporting Council Audit committees and regulators will expect a structured, multi-year plan for establishing reliable, traceable, assurance-ready emissions data.

Scenario analysis depth. TCFD-aligned scenario analysis has typically been high-level and qualitative. UK SRS S2 expects a more rigorous, financially quantified approach that explicitly links climate scenarios to financial statement line items. This is a step change for most organisations.

Board-level governance evidence. The FCA’s proposals require in-scope companies to make mandatory disclosures in relation to UK SRS S2 on climate-related reporting, and to set out whether or not they have disclosed a transition plan. KPMG Board-level sustainability oversight needs to be explicit, evidenced, and described in a way that satisfies both auditors and investors, with clear links between sustainability KPIs and executive remuneration where relevant.

Assurance readiness. eco-shaper’s audit trail, version governance, and data traceability are built to withstand third-party scrutiny. With ISSA (UK) 5000 effective for periods beginning 15 December 2026, the infrastructure you build now is the infrastructure your assurance provider will review. Starting with eco-shaper means the review is one you can face with confidence.

UK SRS S1 general sustainability breadth. This is entirely new territory for most UK businesses. Recognising that wider sustainability reporting against UK SRS S1 will be new to many listed companies and may present additional challenges, the FCA has proposed that this will be on a “comply or explain” basis. Addleshaw Goddard UK SRS S1 spans biodiversity, water, workforce, and supply chain. Most companies have limited disclosure infrastructure here and will need to build it ahead of the 2029 deadline. Starting that process now, not in 2028, is the difference between a managed transition and a rushed one.

How eco-shaper can help

UK SRS is not just a compliance obligation. It is an opportunity to get ahead of mandatory deadlines with the right infrastructure already in place. eco-shaper is a zero-touch carbon accounting platform built to help businesses measure, manage, and report their emissions accurately and efficiently, without the spreadsheets.

Here is what eco-shaper can do for your UK SRS preparation:

Scope 1, 2 and 3 tracking — eco-shaper tracks your full emissions footprint in real-time across all three scopes, using GHG Protocol compliant algorithms. With Scope 3 reporting required on a “comply or explain” basis from 2028, building that data capability now is essential.

Supply chain engagement — eco-shaper’s supplier portal makes it straightforward to collect emissions data directly from your supply chain, feeding it into your master reporting board. This is exactly the kind of value chain data UK SRS S2 will require.

Employee engagement — Distribute personalised reduction strategies across your organisation and give staff a direct role in contributing accurate Scope 3 data for work-related activities.

Zero-touch data automation — Automate your data input and eliminate human error from your sustainability reporting, producing disclosures that are traceable, consistent, and ready for scrutiny.

Sprout, your AI reductions agent. Sprout analyses your sustainability data and generates a tailored reduction strategy for your business. With built-in net zero planning functionality, Sprout supports you in building the transition plan that UK SRS S2 requires companies to disclose, helping you move from measurement to meaningful action.

Compliance-ready reporting — eco-shaper’s reporting is built around the frameworks regulators require, giving you the foundation to meet UK SRS disclosure expectations as mandatory deadlines approach.

The mandatory clock for listed companies starts on 1 January 2027 — less than ten months away. For private companies, the MCR consultation is closer than many expect. Whether you are a listed company building towards a 2027 deadline or a private business getting ahead of incoming requirements, the time to establish your reporting infrastructure is now, not when the deadline is months away.

Start your free trial with eco-shaper today and see exactly where your business stands against UK SRS.