UK SRS vs ESRS

UK SRS and ESRS are the UK's and the EU's flagship sustainability-reporting regimes — and they take different routes.

UK SRS is the UK endorsement of the ISSB's IFRS S1 and S2.

It uses financial (single) materiality, is climate-first (a general standard plus a climate standard), and is aimed primarily at investors.

ESRS are the European Sustainability Reporting Standards mandated under the EU's Corporate Sustainability Reporting Directive (CSRD).

They use double materiality and span twelve standards covering the full breadth of environmental, social and governance topics.

For UK groups with EU operations, the practical question is rarely "which one" but "how do we satisfy both efficiently".

The ESRS were developed by EFRAG and adopted by the European Commission as a delegated act on 31 July 2023, becoming the standards companies must use to meet CSRD disclosure requirements.

The first set comprises twelve standards: two cross-cutting (ESRS 1 General requirements and ESRS 2 General disclosures) and ten topical — E1–E5 on climate, pollution, water and marine resources, biodiversity, and resource use; S1–S4 on own workforce, value-chain workers, affected communities and consumers; and G1 on business conduct.

ESRS disclosures sit in the management report alongside the financial statements, with limited assurance required initially, moving toward reasonable assurance.

The EU's Omnibus simplification culminated on 3 July 2026: the Commission adopted revised ESRS cutting mandatory datapoints by 61% and total datapoints by more than 70%, and improving interoperability with IFRS S1 and S2.

Adopted is not the same as in force — see the status note below.

The narrowing of CSRD scope was done by Directive (EU) 2026/470 — the Omnibus I Directive — not by the revised standards.

It amends four directives at once: 2006/43/EC, 2013/34/EU, (EU) 2022/2464 and (EU) 2024/1760.

The dates, because they are three different things and get conflated.

The directive is dated 24 February 2026.

It was published in the Official Journal on 26 February 2026.

It entered into force on 18 March 2026 — publication plus twenty days, under its Article 6.

Member States must transpose it by 19 March 2027 under Article 5(1), with a second transposition date of 26 July 2028 for the due-diligence limb.

The reporting changes apply from financial years beginning on or after 1 January 2027.

Article 19a(1) now opens with a size limb of EUR 450,000,000 net turnover and an average of 1,000 employees.

What it does NOT change is the materiality test itself: the two limbs — information necessary to understand the undertaking's impacts on sustainability matters, and information necessary to understand how sustainability matters affect its development, performance and position — are word-for-word what they were.

Fewer undertakings in scope, same test for those still in it.

The two instruments do different jobs and are routinely conflated: Directive (EU) 2026/470 narrowed who reports; the 3 July 2026 delegated act simplified what they report.

Citing one for the other is the most common error in circulation.

The number of standards is unchanged at twelve.

The revision cuts datapoints and restructures chapters — it does not delete standards.

UK SRS S1 and S2 are the UK's endorsement of the ISSB's IFRS S1 (general sustainability) and IFRS S2 (climate), published by the Department for Business and Trade on 25 February 2026.

They use financial materiality — information that could reasonably affect investors' decisions — and follow the four-pillar architecture inherited from the TCFD: governance, strategy, risk management, and metrics and targets.

The FCA's CP26/5 proposes making UK SRS S2 mandatory for around 515 of the roughly 600 UK-listed companies it affects — those with a commercial companies, non-equity/non-voting-equity-shares or transition-category listing — from 1 January 2027, superseding the TCFD-aligned listing rules for those categories.

The remaining 89, listed only via the secondary-listing or depositary-receipts categories, face no UK SRS obligation under the proposal.

UK SRS is therefore narrower than ESRS in scope but tightly focused on investor-relevant, decision-useful disclosure.

Many UK groups will report under UK SRS at home while also being caught by CSRD/ESRS for their EU operations — through large EU subsidiaries or significant EU turnover.

Because ESRS is designed to be interoperable with IFRS S1 and S2, much of the underlying data can be shared, but the double-materiality assessment and the broader topical coverage of ESRS require additional work.

The practical approach is to build one robust data and governance foundation, then map it to each regime's requirements rather than running two separate processes.

Our companion guide explains exactly how UK companies get caught by CSRD and how to plan dual compliance.