UK SRS S2 and GRI Climate Reporting: What Data Can Be Reused?

Educational practitioner material. Illustrative examples and wording require adaptation and technical review.

Climate reporting teams often begin with a practical question: can the emissions inventory already prepared for one framework be used for another? In most cases, rebuilding activity data, emission-factor libraries and calculation workbooks is wasteful and increases inconsistency. A common controlled dataset is therefore the right starting point.

The dataset is not the report. UK SRS S2 asks what climate-related risks and opportunities could affect the entity’s prospects and what information primary users need. GRI asks the organisation to report on its most significant impacts on the economy, environment and people. The same tonnes of carbon dioxide equivalent can be relevant to both, but the reason for disclosing them, the accompanying narrative, stakeholder context and claim basis differ.

A common climate dataset can feed both frameworks, but the UK output answers an investor-focused question while the GRI output explains significant impacts and the organisation’s response.

GRI and the IFRS Foundation have stated that GRI 102 and IFRS S2 can be used together and that certain equivalent IFRS S2 Scope 1, Scope 2 and Scope 3 disclosures can satisfy the corresponding GRI 102 emissions disclosures where the emissions are measured using the GHG Protocol Corporate Standard and the GRI Content Index points to the relevant information. The joint statement also highlights complementary transition-plan, adaptation and just-transition information.

A reusable climate dataset should be designed at the level of source facts and evidence, not at the level of final paragraphs. The following fields create a practical common core.

Scope 1, Scope 2 and Scope 3 calculations are the clearest area for reuse. The same facility energy data, fuel consumption, refrigerants, purchased electricity, supplier information and estimation models should not be recalculated separately simply because the final report changes. Instead, the master ledger should produce framework-specific views.

Boundary and consolidation

UK SRS S2 connects the emissions boundary to the reporting entity and asks for Scope 1 and Scope 2 emissions for the consolidated accounting group and separately for other investees. GRI uses the organisation’s reporting scope and applicable GRI requirements. The master record therefore needs ownership, control, consolidation and value-chain attributes. A “group total” without these attributes is not a reliable reusable dataset.

Scope 2

UK SRS S2 starts from location-based Scope 2 and requires relevant information about contractual instruments. GRI 102 includes its own Scope 2 requirements and methodological disclosures. Retain both location-based and market-based calculations, contractual-instrument records and quality criteria so that each output can be prepared without reopening the source data.

Scope 3

A 15-category screening register is useful for both systems. It should record relevance, expected magnitude, data availability, calculation method, estimate quality, double-counting risks and reasons for exclusion or non-applicability. UK SRS S2 may use the first-year Scope 3 relief in C4 if the conditions are met and the use is disclosed. That relief does not remove the GRI assessment or make the category irrelevant to the organisation’s impacts.

The climate issue register can be shared if it does not reduce every issue to a financial-risk entry. A strong record separates the external impact pathway from the financial transmission channel. For example, high water consumption at a drought-exposed site can create an impact on local ecosystems and communities; it can also create production interruption, licence-to-operate and cost risks. The evidence overlaps, but the GRI and UK materiality conclusions may differ.

Scenario analysis can also be common. The physical and transition pathways, assumptions and asset-level exposures can support both reports. UK SRS S2 uses them to explain climate resilience and effects on the entity’s prospects. GRI reporting can use them to explain actual and potential impacts, adaptation responses and affected stakeholders. The scenario result should therefore be stored separately from the framework narrative.

The action register is another high-value common component. It can carry decarbonisation levers, energy actions, product changes, capital allocation, workforce measures, supplier programmes, dependencies and progress. UK SRS S2 focuses on how the plan relates to strategy, targets, resilience and prospects. GRI 102 adds an impact-oriented account, including how mitigation and adaptation actions affect people and the need for a just transition.

A target register should make gross and net targets explicit. It should state the base year, boundary, metric, milestone years, method, validation status, performance and revisions. Where credits are planned, the credit register should be linked but not netted into the gross inventory. This supports both UK SRS S2 integrity disclosures and GRI transparency about climate action and claims.

1. Define the two reporting bases, including entity, period, publication location, materiality lens, claim and applicable GRI edition.

2. Create a master climate data dictionary and evidence register before drafting either report.

3. Reconcile the GHG boundary and retain the attributes needed for both the UK reporting entity and GRI reporting scope.

4. Run a complete Scope 3 category screening and keep separate framework decisions, reliefs and omissions.

5. Map common transition actions, targets, credits, removals and scenario inputs to both standards.

6. Perform separate UK financial-materiality and GRI impact-significance assessments using the common issue evidence.

7. Draft two narratives: one about prospects and primary users; one about significant impacts and affected stakeholders.

8. Reconcile all repeated facts, numbers, dates and claims across the outputs and the GRI Content Index.

9. Obtain separate technical and governance approval for the UK compliance statement and the GRI statement of use.

Treating emissions-data equivalence as equivalence of the whole climate-reporting package.

Using the UK investor lens to screen out climate impacts that may be material under GRI.

Preparing a GRI impact narrative without connecting UK SRS S2 risks to budgets, scenarios and financial effects.

Using different emission factors or base-year restatements in the two reports because teams maintain separate workbooks.

Applying UK Scope 3 transition relief as though it were a GRI omission basis.

Omitting just-transition and affected-stakeholder information from the GRI narrative because it is not central to the UK investor disclosure.

Making a combined “compliant with UK SRS and GRI” claim without separate completeness and claim reviews.

The most useful implementation tools are a climate data dictionary, GHG boundary memorandum, 15-category Scope 3 screening register, impact/risk/opportunity register, transition-action register, target and credit register, GRI Content Index mapping and a cross-report reconciliation control. These tools allow data reuse without forcing false equivalence.