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UK-SRSFinal standards published 25 February 2026 for voluntary use; FCA consultation CP26/5 closed 20 March 2026; FCA policy statement expected autumn 2026 (not published as of 23 September 2026)

UK Sustainability Reporting Standards (UK SRS S1 and UK SRS S2)

United Kingdom · UK Government (Department for Business, Innovation, Science and Trade, renamed from DBT in July 2026) / FRC; FCA for listed-entity application

UK SRS S1 and S2 are the UK government's endorsed versions of IFRS S1 and S2, published on 25 February 2026 for voluntary use. Voluntary users can apply the Scope 3 and non-climate reliefs with no time limit. The FCA has consulted on listing rules that would make UK SRS S2 climate reporting mandatory for listed companies, with Scope 3 emissions and UK SRS S1 non-climate reporting on a comply-or-explain basis.

Category
ISSB-aligned sustainability disclosure
Enforcement
Voluntary at publication. FCA proposes mandatory UK SRS S2 for listed issuers (Scope 3 and broader sustainability on comply-or-explain).
Effective date
Voluntary use: no effective date (entities apply the standards when they choose). FCA proposal, subject to the final policy statement: rules in force 1 January 2027 for accounting periods beginning on or after 1 January 2027; using the transitional reliefs, Scope 3 reporting from periods beginning on or after 1 January 2028 and UK SRS S1 non-climate reporting from periods beginning on or after 1 January 2029.
Covered entities
Any entity (voluntary). The FCA proposal covers issuers in the commercial companies (UKLR 6), non-equity and non-voting equity shares (UKLR 16), transition (UKLR 22), secondary listing (UKLR 14) and depositary receipts (UKLR 15) categories. No mandate yet for unlisted companies.
Notes
The FCA aims to publish its CP26/5 policy statement in autumn 2026. The Modernising Corporate Reporting consultation (published 7 September 2026, closes 30 November 2026) says the government will consider how UK SRS should be reflected in the Companies Act 2006 after that consultation and the CFD post-implementation review. The same document says the government has no plans at this stage to require assurance of UK SRS reporting and plans a voluntary oversight regime for sustainability assurance practitioners. The government response on transition plan requirements is still pending. See UK-CFD row.

Sources

Related regulations

UK-CFD

The Companies (Strategic Report) (Climate-related Financial Disclosure) Regulations 2022 (SI 2022/31) and the LLP equivalent (SI 2022/46)

United Kingdom · UK Government (originally BEIS, then DBT; now the Department for Business, Innovation, Science and Trade after the July 2026 rename)
Effective

UK regulations requiring around 1,300 of the largest UK companies and LLPs to make TCFD-aligned climate disclosures in their strategic report covering governance, strategy, risk management, and metrics and targets. The first G20 mandatory TCFD-aligned regime.

Enforcement
Mandatory
Effective date
Financial years beginning on or after 6 April 2022
Covered entities
Traded companies, banking companies, authorised insurers, AIM-listed companies with >500 employees, and other large companies/LLPs with >500 employees and >£500m turnover
Primary source ↗Verified 2026-09-23
Effective (phased)

FCA regime for sustainability disclosure and fund labelling, with four investment labels (Focus, Improvers, Impact, Mixed Goals), anti-greenwashing requirements for all FCA-authorised firms, and naming/marketing rules for funds making sustainability claims.

Enforcement
Mandatory
Effective date
Anti-greenwashing rule from 31 May 2024. Investment labels available from 31 July 2024. Naming and marketing rules from 2 December 2024. Entity-level disclosures from 2 December 2025 for firms with more than GBP 50bn AUM and from 2 December 2026 for firms with more than GBP 5bn AUM.
Covered entities
FCA-authorised firms (anti-greenwashing); UK asset managers and distributors of investment funds (labels, naming and marketing, disclosures)
Primary source ↗Verified 2026-09-23
UK-SECR

Streamlined Energy and Carbon Reporting (SECR) – Companies (Directors' Report) and LLPs (Energy and Carbon Report) Regulations 2018

United Kingdom · UK Government (DESNZ leads SECR policy; the Companies Act reporting framework sits with the Department for Business, Innovation, Science and Trade)
Effective

UK regime requiring quoted companies, large unquoted companies, and large LLPs to disclose UK energy use, GHG emissions, and at least one intensity metric in their annual reports. Quoted companies report global Scope 1+2 emissions plus underlying global energy use.

Enforcement
Mandatory
Effective date
Financial years starting on or after 1 April 2019
Covered entities
Quoted companies; large unquoted companies and large LLPs (meeting two of: >250 employees, >£36m turnover, >£18m balance sheet). Low energy users (<40 MWh) exempt.
Primary source ↗Verified 2026-09-23
In force from 31 May 2024

The rule requires that any reference an authorised firm makes to the sustainability characteristics of its products or services is consistent with those characteristics and is fair, clear and not misleading. FG24/3 sets out the FCA's expectations on substantiation, evidence and ongoing review.

Enforcement
Mandatory
Effective date
31 May 2024
Covered entities
All FCA-authorised firms making references to the sustainability characteristics of a product or service to UK clients (retail or professional)
Primary source ↗Verified 2026-09-23
Guidance issued 20 September 2021; supplementary supply-chain guidance issued 22 January 2026; CMA gained direct enforcement powers under the Digital Markets, Competition and Consumers Act 2024 (in force April 2025)

The Green Claims Code sets six principles for environmental claims: claims must be truthful and accurate, clear and unambiguous, must not omit material information, comparisons must be fair, the full life cycle must be considered, and claims must be substantiated. Breaches are pursued under consumer protection law; the CMA can now impose civil fines of up to 10 percent of global turnover.

Enforcement
Guidance (interpreting binding consumer protection law)
Effective date
20 September 2021
Covered entities
Any business selling or promoting goods or services to UK consumers, including non-UK businesses marketing into the UK
Primary source ↗Verified 2026-09-23
UK-MSA-S54

Modern Slavery Act 2015, Section 54 (Transparency in supply chains)

United Kingdom · Home Office (policy and guidance); Secretary of State for the Home Department can seek injunctions in the High Court
In force from 29 October 2015; amending provisions in the Immigration and Asylum Bill are before Parliament (not yet law as of 23 September 2026)

Covered organisations must publish an annual modern slavery and human trafficking statement, approved by the board (or equivalent) and signed by a director, setting out the steps taken (or stating that no steps were taken) to ensure slavery and human trafficking are not occurring in their business or supply chains. The Home Office maintains a central registry and the Secretary of State may seek civil injunctions for non-compliance.

Enforcement
Mandatory
Effective date
29 October 2015; first statements required for financial years ending on or after 31 March 2016
Covered entities
Commercial organisations (any body corporate or partnership, wherever incorporated) carrying on any part of a business in the UK and supplying goods or services with a total annual turnover of GBP 36 million or more (group turnover where applicable).
Primary source ↗Verified 2026-09-23