Framework Comparison
UK SRS vs ESRS
The UK Sustainability Reporting Standards and the EU's European Sustainability Reporting Standards both flow from the same climate-disclosure roots, but differ on materiality, scope and who must comply.
A practitioner comparison for UK companies — including those caught by both.
The quick answer
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".
What the ESRS are
European Sustainability Reporting Standards
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.
A 2025 EU "omnibus" simplification is reducing the number of mandatory data points and improving interoperability with IFRS S1 and S2.
What UK SRS is
UK Sustainability Reporting 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 UK listed companies from 1 January 2027, superseding the TCFD-aligned listing rules.
UK SRS is therefore narrower than ESRS in scope but tightly focused on investor-relevant, decision-useful disclosure.
UK SRS vs ESRS — the key differences
| Dimension | UK SRS | ESRS (EU) |
|---|---|---|
| Basis | UK endorsement of ISSB IFRS S1 & S2 | EU standards under CSRD, developed by EFRAG |
| Materiality | Financial (single) materiality | Double materiality (impact + financial) |
| Coverage | General (S1) + climate (S2) — climate-first | 12 standards across E, S and G |
| Who applies | UK listed; proposed mandatory from 2027 | EU companies + large non-EU groups with EU activity |
| Assurance | Building (ISSA (UK) 5000) | Limited assurance, moving to reasonable |
| Where reported | Annual report / strategic report | EU management report |
"Same climate roots, different philosophies: UK SRS asks what matters to investors; ESRS asks that, plus what the company does to the world."UK SRS vs ESRS analysis
Do UK companies need both?
When UK groups face both regimes
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.
What is the difference between UK SRS and ESRS?
UK SRS is the UK's endorsement of the ISSB's IFRS S1 and S2, using financial (single) materiality and a climate-first scope, aimed at investors.
ESRS are the European Sustainability Reporting Standards under the EU's CSRD, using double materiality across 12 standards covering the full breadth of environmental, social and governance topics.
How many ESRS are there?
Twelve in the first set: two cross-cutting standards (ESRS 1 General requirements and ESRS 2 General disclosures) and ten topical standards — E1–E5 (climate, pollution, water and marine, biodiversity, resource use), S1–S4 (own workforce, value-chain workers, affected communities, consumers) and G1 (business conduct).
Do UK companies have to comply with ESRS?
Only if they are caught by the EU CSRD — for example, large EU subsidiaries, or non-EU groups with significant EU turnover and an EU presence.
Many UK groups will report under UK SRS at home and ESRS for their EU operations.
See our CSRD vs UK SRS guide for how UK companies get caught.
Are UK SRS and ESRS converging?
Both build on the same foundations (the TCFD pillars and, for ESRS, interoperability with IFRS S1/S2), and the EU's 2025 omnibus simplification aims to reduce ESRS data points and improve alignment.
But the core difference — single vs double materiality — remains.