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FAQ · comprehensive guide

UK SRS FAQ: essential questions answered

This UK SRS FAQ answers the essential questions about the UK Sustainability Reporting Standards, cited to the standards themselves, the FCA’s final rules and FCA CP26/5.

It covers the UK SRS consultation, the FCA’s comply-or-explain timetable, scope, Scope 3, assurance and liability.

01 · The framework

The UK SRS framework and the UK SRS consultation

There have been three consultations, and they are often conflated.

The three consultations

  1. 25 Jun 2025
    DBT — UK SRS exposure drafts

    Closed 17 September 2025; 209 responses. Final standards and response published 25 February 2026.

  2. 30 Jan 2026
    FCA — CP26/5

    Closed 20 March 2026. Final rules published 30 September 2026 as PS26/19: comply or explain from 2027.

  3. 7 Sep 2026
    Modernising corporate reporting

    Closes 30 November 2026. The government "will consider" UK SRS in the Companies Act 2006.

What are the UK Sustainability Reporting Standards?

The UK Sustainability Reporting Standards (UK SRS) are the UK Government’s endorsed versions of the ISSB’s global baseline sustainability disclosure standards — IFRS S1 and IFRS S2.

Published by DBT on 25 February 2026 for voluntary use, UK SRS S1 covers general sustainability-related financial disclosures while UK SRS S2 covers climate-related disclosures.

Both incorporate UK-specific differences and are designed to be reported alongside the financial statements — in the UK, typically within the Strategic Report.

How do UK SRS relate to IFRS S1 and IFRS S2?

UK SRS S1 and S2 are the UK’s national adoptions of IFRS S1 and IFRS S2 respectively.

They follow the ISSB global baseline with a small number of UK-specific differences, so companies reporting under UK SRS will be substantially aligned with the global ISSB framework.

One exception matters: UK SRS S1 ¶73A means an entity using the climate-first relief cannot assert compliance with UK SRS S1.

The differences are mapped in Annex A of the government’s consultation response, which states that where a requirement is not in its table there is no difference.

What are the UK-specific amendments to the ISSB standards?

The government consulted on six proposed amendments in June 2025, but two did not survive to publication (one withdrawn, one replaced) and further provisions were added afterwards, so the final position is mapped in Annex A rather than by a count.

The final differences are:

  • no effective date;
  • no first-year delayed-reporting relief;
  • the climate-first (UK SRS S1 ¶E3) and Scope 3 (UK SRS S2 ¶C4) reliefs left untimed, with availability set by UK law or FCA rules (S1 ¶E5, S2 ¶C6);
  • SASB references softened from “shall” to “may”;
  • new S1 ¶¶73A–73B on compliance statements and UK-law override;
  • S2 ¶B59A, requiring an explanation where financed emissions cannot be estimated for the reporting period.

The removal of the GICS requirement for financed emissions was the ISSB’s own December 2025 amendment to IFRS S2, not a UK amendment.

What was the UK SRS consultation?

There have been three consultations, and they are often conflated.

The Department for Business and Trade consulted on the exposure drafts of UK SRS S1 and S2 from 25 June to 17 September 2025, received 209 responses, and published its response with the final standards on 25 February 2026.

The FCA consulted in CP26/5 from 30 January to 20 March 2026 on making UK SRS S2 mandatory for in-scope listed companies.

Its final rules, PS26/19, published on 30 September 2026, instead require listed companies in scope to report against UK SRS on a comply-or-explain basis for accounting periods beginning on or after 1 January 2027.

The Modernising corporate reporting consultation, published 7 September 2026 and closing 30 November 2026, says the government “will consider how UK SRS should be reflected in the Companies Act 2006”.

02 · Dates

Timeline and the FCA’s final dates

The dates below are the FCA’s final rules, published on 30 September 2026 as PS26/19.

  1. 25 Feb 2026
    Voluntary use

    UK SRS S1 and S2 available to any entity.

  2. 30 Sep 2026
    FCA final rules

    PS26/19: comply or explain across the UK SRS for listed companies in scope.

  3. 1 Jan 2027
    Comply or explain begins

    Accounting periods starting on or after this date; first reports in 2028.

  4. 1 year
    Scope 3 relief

    One year’s non-disclosure of Scope 3 under UK SRS S2, stated as used.

  5. 2 years
    S1 non-climate relief

    Two years’ non-disclosure of UK SRS S1 non-climate matters.

Sources: FCA PS26/19 ¶3.12, ¶3.14 — the final rules, finalising FCA CP26/5

When does UK SRS become mandatory?

It does not become mandatory.

The FRC’s sustainability reporting FAQ puts the standards’ own status plainly: “Reporting against the UK SRS is not currently mandatory.”

The FCA’s final rules (PS26/19, 30 September 2026) require listed companies in scope to report against UK SRS on a comply-or-explain basis for accounting periods beginning on or after 1 January 2027, with first reporting in 2028.

The consultation, FCA CP26/5, had proposed making UK SRS S2 mandatory; the final rules adopt comply or explain across all categories of disclosure instead.

CP26/5 estimated that around 600 listed companies would be affected; the Policy Statement gives no total count.

A company may use two years’ non-disclosure of UK SRS S1 non-climate matters and one year’s non-disclosure of Scope 3, stating that it is doing so.

Those relief periods are a feature of the FCA’s rules, not the Standards themselves — UK SRS S1 appendix E carries no time limit of its own.

What is the Scope 3 transition timeline?

Under the FCA’s final rules, Scope 3 is on a comply-or-explain basis from the start, like every other UK SRS disclosure.

A company may use a one-year relief from disclosing Scope 3 under UK SRS S2 (PS26/19 ¶3.14).

Using it requires only a statement that the company is doing so — no further explanation is required during the relief period (¶3.20).

Companies already disclosing Scope 3 may continue to do so.

After that year, Scope 3 is disclosed, or its omission explained.

It never becomes mandatory: the consultation, CP26/5, had proposed a mandatory UK SRS S2 core with Scope 3 outside it, and the final rules put all of it on comply or explain.

Can companies adopt UK SRS voluntarily before the FCA rules apply?

Yes.

Both UK SRS S1 and S2 have been available for voluntary use since their publication on 25 February 2026.

An entity may only state that it complies with UK SRS if it meets all the applicable requirements (UK SRS S1 ¶72) — partial use is possible, but it cannot be described as compliance.

03 · Scope

Scope and application

5
Listing categories in scope — UKLR 6, 14, 15, 16 and 22
FCA PS26/19 ¶3.6
~600
Listed companies CP26/5 estimated would be affected — the consultation’s estimate
FCA CP26/5 Annex 2 ¶43
Private companies

No government document proposes any threshold or date for private companies.

Which companies must comply with UK SRS?

Listed companies in scope of the FCA’s final rules report against UK SRS on a comply-or-explain basis for accounting periods beginning on or after 1 January 2027; no other UK entity is required to use it.

Scope is five listing categories (PS26/19 ¶3.6): commercial companies (UKLR Chapter 6), international commercial companies secondary listing (UKLR Chapter 14), depositary receipts (UKLR Chapter 15), non-equity shares and non-voting equity shares (UKLR Chapter 16), and the transition category (UKLR Chapter 22), as the UK Listing Rules application table names them.

Closed-ended investment funds, open-ended investment companies, shell companies, and debt, securitised derivative and miscellaneous securities are excluded (¶3.7).

The Policy Statement gives no total count; CP26/5, the consultation, estimated that around 600 listed companies would be affected.

The premium and standard listing segments referenced in older commentary were abolished on 29 July 2024 and have no bearing on current UKLR scope.

FCA CP26/5 Chapter 3 set out the scope definitions as consulted on.

Do overseas companies listed in the UK need to comply?

Yes, if they are listed in a category in scope.

Under the FCA’s final rules, companies with a secondary listing (UKLR 14) or a depositary receipts listing (UKLR 15) report against UK SRS on a comply-or-explain basis, as do the commercial companies, non-equity shares and transition categories — regardless of domicile.

The consultation had proposed only that they state which overseas climate and sustainability standards they apply and signpost where those disclosures can be found; the final rules did not adopt that.

More on overseas companies and UK SRS.

Will UK SRS apply to private companies?

Not today, and nothing is proposed.

The government’s February 2026 response said the Modernising Corporate Reporting programme would consider whether the Companies Act should require private entities to report against UK SRS.

The Modernising corporate reporting consultation, published 7 September 2026, says only that the government “will consider how UK SRS should be reflected in the Companies Act 2006”.

No government document proposes any threshold or date for private companies.

See private companies and UK SRS.

04 · The standards

UK SRS S1 and S2

The four pillars

  1. 01
    Governance

    Oversight and governance processes

  2. 02
    Strategy

    Actual and potential effects on strategy and business model

  3. 03
    Risk management

    Processes to identify, assess and manage risks

  4. 04
    Metrics and targets

    What the entity uses to assess and manage risks and opportunities

What is the difference between UK SRS S1 and S2?

UK SRS S2 deals exclusively with climate-related financial disclosures — greenhouse gas emissions, climate risks and opportunities, and transition planning.

UK SRS S1 covers general sustainability-related financial disclosures beyond climate, including biodiversity, water resources, social factors and human capital.

Under the FCA’s final rules both are reported on a comply-or-explain basis by listed companies in scope from accounting periods beginning on or after 1 January 2027.

A company may use two years’ relief for S1 non-climate matters and one year’s relief for Scope 3 under S2.

What is the materiality definition under UK SRS?

UK SRS assesses materiality by reference to an entity’s cash flows, its access to finance or its cost of capital (UK SRS S1 paragraph 3).

Sustainability information is material if omitting, misstating or obscuring it could reasonably be expected to influence decisions that primary users make on the basis of general purpose financial reports (paragraph 18).

This is a financial materiality test, not impact (double) materiality.

What is the four-pillar framework?

UK SRS uses a four-pillar disclosure framework inherited from TCFD but significantly expanded.

Governance covers oversight and governance processes; Strategy, the actual and potential effects on strategy and business model; Risk Management, the processes to identify, assess and manage sustainability risks; and Metrics and Targets, the measures used to assess and manage sustainability-related risks and opportunities.

05 · Climate

Climate and Scope 3

Not required: a transition plan

UK SRS S2 asks for information about a plan if the entity has one.

The FCA’s final rules ask whether there is a plan and where it is — not a duty to have one.

Required by the Standard: scenario analysis

UK SRS S2 ¶22, with an approach commensurate with the entity’s circumstances.

Is climate scenario analysis mandatory under UK SRS?

It is required by the Standard.

UK SRS S2 ¶22 requires an entity to use climate-related scenario analysis to assess its climate resilience — a significant strengthening from the TCFD regime, where it was recommended but not required.

The entity must disclose how the analysis was done, including the scenarios, inputs and key assumptions used, with an approach commensurate with its circumstances.

What must companies disclose about transition plans?

UK SRS S2 does not require a company to have a transition plan.

Where it has one, UK SRS S2 ¶14(a)(iv) requires disclosure of information about it, including the key assumptions used in developing it and the dependencies it relies on.

Separately, the FCA’s final rules require in-scope listed companies to disclose in the annual report whether they have a climate-related transition plan and, if so, where it can be found (PS26/19 ¶2.37) — not a duty to have a plan, as FCA CP26/5 had also proposed.

What are the Scope 3 disclosure requirements?

UK SRS S2 paragraph 29(a) requires disclosure of absolute gross Scope 3 greenhouse gas emissions, the Scope 3 categories included in the measure, and the measurement approach, inputs and assumptions used.

Emissions are measured under the GHG Protocol Corporate Standard unless a jurisdictional authority or exchange requires another method (¶29(a)(ii)), and the categories are those of the GHG Protocol Scope 3 Standard.

Under the FCA’s final rules Scope 3 is on a comply-or-explain basis, like every other UK SRS disclosure.

A company may use one year’s non-disclosure of Scope 3, stating that it is doing so; after that, it discloses Scope 3 or explains why not.

06 · Assurance

Assurance is voluntary

Not required

The FCA’s final rules do not require assurance; where it is obtained, the company names the provider, scope and standards.

ISSA (UK) 5000 is for voluntary use.

Is assurance required for UK SRS disclosures?

UK SRS assurance is voluntary.

The FCA’s final rules do not require assurance (PS26/19 ¶2.45).

Where a listed company in scope obtains assurance, it names the assurance provider, which disclosures were assured and which assurance standards were used.

The consultation, FCA CP26/5 paragraph 7.5, had said the FCA was not proposing mandatory assurance at this time, and paragraph 7.8 reserved the question for later.

More at UK SRS assurance.

What is ISSA (UK) 5000?

ISSA (UK) 5000 is the UK sustainability assurance standard issued by the FRC on 12 November 2025.

It is for voluntary use, and its paragraph 15 makes it effective for assurance engagements on sustainability information reported either for periods beginning on or after 15 December 2026, or as at a specific date on or after that date, with earlier application permitted.

It provides general requirements for both limited and reasonable assurance engagements.

The standard is profession-agnostic and applies to all sustainability information except that required in financial statements.

08 · Implementation

Implementation and reporting

Start here

A gap analysis of current TCFD reporting against UK SRS S2 is the first step.

See the UK SRS compliance guide for the full programme.

How should companies prepare for UK SRS compliance?

Six steps:

  • a gap analysis of current TCFD reporting against UK SRS S2 requirements;
  • an assessment of Scope 3 data collection capabilities;
  • a review of governance structures for sustainability oversight;
  • systems and controls to meet UK SRS S1’s “Connected information” requirements (paragraphs 21–24) and its requirement to report sustainability and financial information at the same time and for the same period (paragraph 64);
  • a decision on voluntary assurance arrangements;
  • a board briefing on disclosure obligations and resource requirements.
Where in the annual report do UK SRS disclosures go?

UK SRS S1 ¶¶60–63 require the disclosures to form part of the entity’s general purpose financial reports; the Standards do not prescribe a section.

In the UK the natural home is the Strategic Report, where the section 463 safe harbour applies and where UK SRS S2 can discharge the section 414CB climate disclosure duty through section 414CB(6), provided the use of UK SRS S2 is clearly referenced.

Under the FCA’s final rules listed companies in scope make the disclosures in their annual financial report; the rules are covered at UK SRS regulations.

An entity claiming compliance must include a statement of compliance (UK SRS S1 ¶72) and disclose any reliefs used (¶73A).

Sources

Primary sources

Every figure, date and status on this page traces to the instrument’s owner. Secondary commentary is never the source for a number.

Checked against 20 sources fromFinancial Conduct AuthorityDepartment for Business and TradeDepartment for Business, Innovation, Science and TradeFinancial Reporting CouncilIFRS FoundationGHG Protocol
  1. Financial Conduct Authority
    PS26/19: Aligning listed issuers' sustainability disclosures with international standards

    First published 30 September 2026. The final rules: comply or explain across the UK SRS (¶1.2, ¶1.7), scope (¶¶3.6–3.7), commencement (¶3.12), reliefs (¶¶3.14, 3.20), transition plans (¶2.37) and assurance (¶2.45).

  2. Financial Conduct Authority
    CP26/5 — Sustainability disclosures (PDF)

    The consultation PS26/19 finalises: scope as consulted (chapter 3), the estimate of around 600 affected (Annex 2 ¶43) and assurance (¶¶7.5–7.8).

  3. Department for Business and Trade
    UK SRS S1 and S2 — publication page

    The standards, published 25 February 2026 for voluntary use.

  4. Department for Business and Trade
    UK SRS S2 Climate-related Disclosures — the standard (PDF)

    Paragraphs 14(a)(iv) (transition plans), 22 (scenario analysis) and 29(a) (GHG emissions).

  5. Department for Business and Trade
    Government response to the UK SRS consultation

    25 February 2026: 209 responses, the Annex A difference tables, and the section 414CB(6) and section 463 confirmations.

  6. Department for Business, Innovation, Science and Trade
    Modernising corporate reporting — consultation

    Published 7 September 2026, closes 30 November 2026; the government will consider how UK SRS should be reflected in the Companies Act 2006.

  7. Financial Reporting Council
    FRC issues ISSA (UK) 5000

    Issued 12 November 2025 for voluntary use; effective for engagements on periods beginning on or after 15 December 2026, earlier application permitted.

  8. IFRS Foundation
    IFRS Sustainability Disclosure Standards Navigator

    IFRS S1 and IFRS S2, the ISSB global baseline UK SRS endorses.

  9. Department for Business and Trade
    UK SRS S1 General Requirements — the standard (PDF)

    ¶3 and ¶18 (materiality), ¶¶21–24 (connected information), ¶¶60–64 (location and timing), ¶72 and ¶73A (compliance statement and reliefs).

  10. Department for Business and Trade
    Exposure drafts: UK Sustainability Reporting Standards — consultation

    Ran 25 June – 17 September 2025; received 209 responses.

  11. IFRS Foundation
    ISSB issues targeted amendments to IFRS S2 (11 December 2025)

    Permits classification systems beyond GICS for financed emissions — the ISSB’s change, not a UK one.

  12. Financial Reporting Council
    Sustainability reporting developments — FAQ

    "Reporting against the UK SRS is not currently mandatory."

  13. Financial Conduct Authority
    FCA Handbook, UKLR 1.1.1R — the Listing Rules application table

    Names the UKLR 6, 14, 15, 16 and 22 categories; viewed as at 26 September 2026.

  14. Financial Conduct Authority
    FCA Handbook, UKLR 6.6.6R(8) — the TCFD-aligned listing rule

    The TCFD-aligned rule CP26/5 proposed to replace; viewed as at 26 September 2026.

  15. GHG Protocol
    Corporate Accounting and Reporting Standard

    The measurement basis UK SRS S2 ¶29(a)(ii) requires.

  16. GHG Protocol
    Corporate Value Chain (Scope 3) Standard

    The Scope 3 categories UK SRS S2 ¶29(a)(vi) refers to.

  17. Financial Reporting Council
    ISSA (UK) 5000 — standard text (PDF)

    ¶9 (limited and reasonable assurance), ¶12 (financial statements excluded), ¶15 (effective date).

  18. IFRS Foundation
    ISSB and TCFD

    The TCFD disbanded in October 2023; the IFRS Foundation took over monitoring of climate-related disclosure progress.

  19. legislation.gov.uk
    Companies Act 2006, section 463

    Liability for false or misleading statements in the strategic report — the safe harbour.

  20. legislation.gov.uk
    Companies Act 2006, section 414CB

    The climate-related financial disclosure duty; subsection (6) national reporting frameworks.

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