Short answer
The answer, before the reasoning
UK SRS S2 is closely based on IFRS S2, but the standards are not identical. The main UK differences are optional specific reference to the IFRS S2 Industry-based Guidance, a UK-only financed-emissions paragraph B59A, removal of the standard-set effective date and an open-ended Scope 3 transition relief for voluntary users that local UK rules may restrict.
UK SRS S2 also incorporates the ISSB’s December 2025 greenhouse gas amendments from its first publication. A report can support both UK and IFRS claims only after the entity tests these differences, the applicable IFRS amendment date and each standard’s relief limits.
Design block
Functional visual created for London Reporting Academy. The visual is illustrative and should be read with the article.
What is the same at a high level
Both standards focus on climate-related risks and opportunities that could affect the entity’s prospects. Both use the four pillars, require climate-related scenario analysis, address current and anticipated financial effects, require cross-industry and industry-based metrics, and include Scope 1, Scope 2 and Scope 3 greenhouse gas emissions and climate-related targets.
The practical risk is therefore not that the two standards create unrelated reporting systems. It is that a team assumes close alignment means every paragraph, transition relief and compliance conclusion is interchangeable. A dual claim requires a difference register.
In practice
Comparison matrix
| Decision point | UK SRS S2 | IFRS S2 — Dual-compliance action |
|---|---|---|
| Specific industry guidance | Paragraphs 12, 23 and 32 say an entity may refer to and consider the IFRS S2 Industry-based Guidance. | The corresponding IFRS S2 paragraphs require the entity to refer to and consider the Guidance. — Document the IFRS-specific consideration process even where UK reporting uses other industry sources. |
| Industry-based information itself | Industry-based metrics remain required; only the specific Guidance reference is optional. | Industry-based metrics are required and the specific Guidance must be referred to and considered. — Do not interpret UK optionality as permission to omit decision-useful industry information. |
| December 2025 GHG amendments | Fully incorporated into the February 2026 standard. | Effective for annual periods beginning on or after 1 January 2027, with early application permitted. — For a pre-2027 IFRS claim, decide whether the amendments are early applied and state that decision. |
| Scope 3 transition relief | C4 has no stated time limit for voluntary reporters; C6 lets UK authorities remove, limit or condition it. | The equivalent relief is limited to the first annual reporting period of IFRS S2 application. — A voluntary UK reporter may retain a UK S2 claim while using C4 if use is disclosed, but a later-year IFRS claim generally cannot omit Scope 3. |
| Non-GHG Protocol transition relief | C3 applies only in the first annual period if the other method was used immediately before application. | Equivalent first-year transition relief in IFRS S2. — Keep this separate from the paragraph 29 jurisdictional relief available where an authority or exchange requires another method. |
| Financed emissions B59A | Requires an explanation, method/assumptions and plan where same-period financed-emissions estimation is impracticable. | No equivalent B59A paragraph. — Add the UK-specific disclosure without assuming it cures any IFRS timing or measurement gap. |
| Effective date | No standard-set effective date; voluntary use is immediate and mandatory dates come from UK rules. | IFRS S2 was effective from 1 January 2024; the December 2025 amendments are effective from 2027. — Identify the reporting basis, standard version and application date for each claim. |
Optional specific industry guidance does not remove industry information
The UK government changed “shall refer to and consider” to “may refer to and consider” in paragraphs 12, 23 and 32. The change concerns the specific IFRS S2 Industry-based Guidance, not the requirement to provide industry-based information.
Paragraph 32 still requires industry-based metrics associated with particular business models, activities or common industry characteristics. Paragraph 37 still requires the entity to refer to and consider cross-industry and industry-based metrics when selecting metrics for targets. A UK reporter should therefore use a controlled source hierarchy: UK sector regulation, company-specific information, relevant industry practice, the IFRS S2 Guidance, SASB-based materials and peer disclosures, with rationale and version control.
For an IFRS claim, the record must show that the specific IFRS S2 Guidance was referred to and considered. Merely reaching similar metrics through another source may not evidence the IFRS process requirement.
How the December 2025 GHG amendments affect the comparison
The ISSB issued targeted amendments to IFRS S2 in December 2025. They address Category 15 Scope 3 emissions, derivatives and other financial activities, jurisdictional reliefs for measurement methods and global warming potential values, and financed-emissions classification systems.
The UK government incorporated the substantive amendments into the first final UK SRS S2. The consultation response identifies amended paragraphs 29(a)(ii), 29(a)(vi)(2), B21-B22, B24, B28, B37, B59, B62(a) and B63(a), and new paragraphs 29A-29C, B62A and B63A. The UK did not need IFRS transition paragraphs for moving from the earlier version because UK SRS S2 was first issued after the amendments.
IFRS reporters apply those amendments mandatorily for annual periods beginning on or after 1 January 2027, with early application permitted. A 2026 dual reporter therefore needs a version decision: either early apply the IFRS amendments consistently or prepare an adjustment register for any UK provisions that are not yet part of its IFRS reporting basis.
Scope 3 relief: the largest dual-claim gap
UK SRS S2 C4 permits an entity applying the standard not to disclose Scope 3 emissions, including additional financed-emissions information for asset management, commercial banking and insurance. The final UK text contains no first-year limit. The government response explains that voluntary users can use this relief indefinitely, while FCA, Companies Act or another competent UK authority can impose a time limit or other conditions.
IFRS S2 limits the corresponding transition relief to the first annual reporting period. This creates a direct dual-claim test. In a second or later IFRS S2 reporting year, omission of Scope 3 under the UK relief would ordinarily prevent an explicit and unreserved IFRS S2 compliance statement, even if the UK S2 claim remains available.
UK SRS S1 paragraph 73A provides that use of S2 C3 or C4 does not prevent an S2 compliance assertion, provided the relief use is disclosed alongside the statement. That is a UK claim rule and should not be imported into the IFRS conclusion.
In practice
GHG method relief: two mechanisms that are often confused
| Mechanism | When it applies | Duration |
|---|---|---|
| Transition relief - UK C3 / IFRS equivalent | The entity used another measurement method in the annual period immediately before first applying the standard. | First annual reporting period only, plus permitted comparative treatment. |
| Jurisdiction or exchange requirement - paragraph 29(a)(ii) | A jurisdictional authority or listing exchange requires another method for all or part of the entity. | Available while the external requirement applies; document the affected group part and method. |
Financed emissions and UK paragraph B59A
Paragraph B59A applies when an entity determines it is impracticable to reliably estimate financed emissions for the same reporting period as the related financial statements. The entity then discloses why same-period estimation is not possible, the measurement approach, inputs and assumptions used for any reported financed-emissions information, and a plan and timeline to achieve same-period reporting.
B59A does not create a blanket permission to use old portfolio data without challenge. The entity must make an impracticability judgement, explain the resulting measurement basis and retain a credible remediation plan. The report should also remain clear about the date of exposure data, emissions data and financial-statement period.
For dual reporting, B59A is an incremental UK requirement. The IFRS file should separately assess whether the financed-emissions information meets the applicable IFRS S2 measurement and disclosure requirements.
Category 15 limitation and disclosures
Paragraph 29A permits an entity to limit Scope 3 Category 15 to financed emissions from loans and investments and to exclude emissions attributable to derivatives. Paragraph 29B requires the entity to explain what it treats as a derivative and describe the financial activities excluded. Paragraph 29C requires total Category 15 emissions and the financed-emissions subtotal when Category 15 is included.
These amendments can reduce implementation complexity, but they increase the importance of definitions and disclosure of exclusions. A bank, insurer or asset manager should align legal entity, accounting classification, asset class, industry classification, exposure data and GHG calculation records before drafting the narrative.
Dual-compliance decision tree
Fix the reporting periods and versions. Identify the UK reporting period, the IFRS S2 application year and whether the December 2025 amendments are early applied.
Test specific industry-guidance use. Evidence the mandatory IFRS “refer to and consider” process even if the UK report uses a broader source hierarchy.
Test Scope 3 relief separately. Confirm whether the entity is in its first IFRS year and whether any UK legal route limits C4.
Test financed-emissions timing. Apply B59A for the UK report where relevant and assess IFRS requirements independently.
Reconcile all paragraph-level differences. Include GHG methods, GWP values, Category 15 definitions, comparative information and any local rule overlay.
Approve separate compliance statements. Do not use one sentence to imply both claims unless the technical file confirms full compliance with each basis.
Hypothetical bank example
Illustrative scenario - a bank prepares a 2026 UK SRS S2 report and wants to claim IFRS S2 compliance. Its financed-emissions calculation uses December 2025 exposure data and investee emissions from mixed periods. It applies paragraph 29A to exclude derivatives and has not yet completed Scope 3 Category 15 outside financed emissions.
For the UK report, the bank documents its derivative definition and excluded activities under 29B, presents the required Category 15 and financed-emissions information under 29C where applicable, and uses B59A only if it concludes same-period estimation is impracticable, with a plan to close the timing gap. It also discloses any C4 relief use alongside its UK S2 compliance statement.
For the IFRS claim, the bank separately checks whether it is eligible for the first-year Scope 3 relief and whether it has early applied the December 2025 amendments. UK compliance alone does not establish IFRS compliance.
In practice
Common comparison errors
| Error | Why it is wrong | Control |
|---|---|---|
| “UK SRS S2 is identical to IFRS S2” | Paragraph wording, relief duration, B59A and effective-date mechanics differ. | Maintain a paragraph-level difference register. |
| “SASB-based industry information is optional in the UK” | Only the specific reference is optional; industry-based metrics remain required. | Document the source hierarchy and metric-selection rationale. |
| “UK C4 can be used for an IFRS claim indefinitely” | IFRS relief is first-year only. | Separate UK and IFRS claim tests. |
| “B59A allows any lagged financed-emissions data” | It requires an impracticability conclusion, explanation, methodology and remediation timeline. | Retain the timing-gap decision paper and evidence. |
| “The 2025 amendments apply automatically to every 2026 IFRS report” | IFRS mandatory effective date is 2027, although early application is permitted. | Approve and disclose the IFRS early-application decision. |
Readiness
Technical reviewer checklist
- Has the exact UK and IFRS standard version been recorded?
- Has the IFRS S2 Industry-based Guidance been referred to and considered for the IFRS claim?
- Are UK and IFRS Scope 3 relief eligibility and duration tested separately?
- Is the C3 transition relief distinguished from the paragraph 29 jurisdictional-method relief?
- Have paragraphs 29A-29C and any early application of the 2025 IFRS amendments been addressed?
- Does any use of B59A include the required why, method, assumptions, plan and timeline?
- Are separate compliance statements and relief disclosures approved?
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