UK SRS (UK Sustainability Reporting Standards)
The UK Sustainability Reporting Standards (UK SRS) are the UK's endorsed versions of the ISSB's IFRS S1 and S2 sustainability disclosure standards, published by the Department for Business and Trade on February 25, 2026. UK SRS S1 covers general sustainability-related financial disclosure and UK SRS S2 covers climate. Both are voluntary as published, with the FCA proposing the first mandate for listed companies from 2027.
UK SRS is the UK's adoption of the global baseline written by the International Sustainability Standards Board. The government made six amendments to IFRS S1 and S2, and only two change what a company has to produce: the relief letting first-year reporters publish sustainability disclosures later than their financial statements was removed, and consideration of SASB standards became permissive rather than mandatory. Both standards were also stripped of effective dates, leaving timing to regulators and legislation.
Nobody is required to report under UK SRS yet. The FCA's consultation CP26/5, published January 30, 2026, proposes requiring approximately 515 listed issuers in UK Listing Rules categories 6, 16 and 22 to report against UK SRS for accounting periods beginning on or after January 1, 2027, replacing the existing TCFD-aligned listing rules. Scope 3 would run on a comply-or-explain basis with an optional one-year deferral, and non-climate S1 disclosure could be deferred two years. Final rules are expected in autumn 2026.
There is no separate UK SRS filing. Disclosures sit inside the annual financial report and are published at the same time as the financial statements. Existing obligations, including SECR and the 2022 climate-related financial disclosure regulations, continue to apply unchanged. Whether large private companies are included later will be decided through the government's Modernising Corporate Reporting programme.
Assurance is not required, though the FCA has proposed a disclosure about whether assurance was obtained, and the Financial Reporting Council is establishing a voluntary register of sustainability assurance providers.
Frequently asked questions
What is UK SRS? +
UK SRS is the UK's endorsed version of the ISSB's IFRS S1 and S2 sustainability disclosure standards, published on February 25, 2026. UK SRS S1 covers general sustainability disclosure and UK SRS S2 covers climate, including scope 1, 2 and 3 emissions.
Is UK SRS mandatory? +
Not as of August 2026. The standards are voluntary for any entity. The FCA has proposed requiring around 515 listed companies to report from accounting periods beginning on or after January 1, 2027, with final rules expected in autumn 2026.
How is UK SRS different from IFRS S1 and S2? +
Six amendments, two of them operational: the UK removed the relief allowing first-year reporters to publish sustainability disclosures after their financial statements, and made consideration of SASB standards optional. Companies already reporting under IFRS S1 and S2 face very little additional measurement work.
Related terms
ISSB (International Sustainability Standards Board)
The ISSB is a body under the IFRS Foundation that issues global sustainability disclosure standards. IFRS S1 (General Requirements) and IFRS S2 (Climate-related Disclosures) set the baseline for sustainability reporting worldwide, designed for investor-focused, financially material disclosures.
TCFD (Task Force on Climate-related Financial Disclosures)
TCFD is a framework developed by the Financial Stability Board for disclosing climate-related financial risks and opportunities. It organizes recommendations around four pillars: governance, strategy, risk management, and metrics and targets. Though the TCFD disbanded in 2023, its framework lives on through ISSB S2 and CSRD/ESRS.
SECR (Streamlined Energy and Carbon Reporting)
Streamlined Energy and Carbon Reporting (SECR) is the UK's mandatory annual energy and carbon disclosure framework. It requires quoted companies, large unquoted companies, and large LLPs to report their UK energy use, Scope 1 and 2 emissions, an intensity ratio, and the energy efficiency actions taken during the year in their annual report.
CSRD (Corporate Sustainability Reporting Directive)
The Corporate Sustainability Reporting Directive (CSRD) is the European Union's mandatory sustainability reporting law. It requires companies operating in the EU above certain thresholds to disclose environmental, social, and governance (ESG) information according to the European Sustainability Reporting Standards (ESRS), with third-party assurance.
Scope 3 Emissions
Scope 3 emissions are all indirect greenhouse gas emissions that occur in an organization's value chain — both upstream (suppliers, purchased goods, business travel, employee commuting) and downstream (product use, end-of-life treatment, investments). Scope 3 typically represents 70–90% of a company's total carbon footprint.
Assurance and Verification
Assurance (or verification) is an independent third-party assessment of an organization's GHG emissions data and reporting processes. Limited assurance provides moderate confidence that the data is free of material misstatement; reasonable assurance provides a higher level of confidence similar to a financial audit.
Where this shows up in Gravity
- UK SRS guide The full guide to UK SRS requirements, who reports, and the proposed 2027 timeline.
- Carbon accounting Where the scope 1, 2 and 3 inventory UK SRS S2 requires is built in Gravity.
- Sustainability reporting How Gravity turns one emissions inventory into UK SRS, SECR, CSRD and CDP disclosures.