Materiality Framework
Double materiality vs UK SRS's single-materiality approach
Double materiality is the EU's two-lens test for sustainability reporting. UK SRS uses a different approach — single, financial materiality only. Here's what the difference means for UK companies with EU operations.
The two lenses
Under double materiality a topic is reportable if *either* test is met. Financial materiality (the "outside-in" lens) asks how environmental, social and governance factors affect the company's financial performance, enterprise value and risk profile 29. Impact materiality (the "inside-out" lens) asks how the company's own operations, products and services affect people and the environment — whether or not those impacts have an immediate financial effect on the business 29. The concept originated in EU policy under the Non-Financial Reporting Directive and is now codified in the CSRD through the ESRS 30.
What UK SRS does instead
UK SRS S1 requires disclosure of any sustainability matter that could reasonably be expected to affect the entity's cash flows, access to finance, or cost of capital — the financial lens only 3. It does not require companies to report their impacts on society and the environment for their own sake 9. This is the same single-materiality approach used by the ISSB's IFRS S1 and S2, on which UK SRS is based 29. The Global Reporting Initiative (GRI), by contrast, focuses on impact materiality, sitting at the opposite end from the ISSB 32.
Why it matters for UK companies
The practical consequence is scope. A UK company reporting under UK SRS discloses a narrower set of topics than the same company would under the EU's ESRS, because it screens only for financial materiality 929. But a UK company with significant EU operations may fall under *both* regimes — UK SRS at home and CSRD/ESRS in Europe — and must then satisfy both lenses 29. The good news is overlap: EFRAG worked with the ISSB to align the *financial* materiality definitions, and published interoperability guidance mapping ESRS requirements to their ISSB equivalents, with extensive overlap on the climate side (ESRS E1 against IFRS S2), since both draw on the TCFD architecture 31. A company can often reuse much of the same underlying data across both 31.
What is double materiality?
Does UK SRS use double materiality?
What's the difference between single and double materiality?
Is double materiality mandatory for UK companies?
Will the UK adopt double materiality in future?
Related guides & references
UK SRS S1: General Sustainability Disclosures
Complete guide to UK SRS S1 materiality requirements and single-materiality approach.
The GHG Protocol and UK SRS
Global carbon accounting standard that underpins UK SRS S2 emissions reporting.
CSRD vs UK SRS Comparison
Detailed comparison between EU CSRD double materiality and UK SRS single materiality.
UK Sustainability Reporting Guide
Complete overview of UK sustainability reporting landscape and materiality approaches.