What ESG services does RSustain UK provide?

RSustain UK provides ESG strategy advisory, materiality assessments, ESG system design, regulatory alignment (UK SDR, CSRD, ISSB), and implementation support. We focus on building audit-ready ESG frameworks without providing statutory assurance.

Does RSustain UK provide Net Zero or carbon footprint services?

Yes. RSustain UK supports organisations with Scope 1, 2, and 3 carbon footprinting, Science Based Targets (SBTi) alignment, and Net Zero transition planning. All services are advisory and system-design focused and do not include third-party verification or validation.

Is RSustain UK an assurance or verification body?

No. RSustain UK does not provide statutory assurance, verification, or validation services. We support organisations in achieving assurance readiness by designing robust ESG, carbon, and compliance systems aligned with regulatory expectations.

Which regulations and frameworks does RSustain UK work with?

RSustain UK works with global and UK frameworks including CSRD, UK SDR, SECR, ISSB (IFRS S1/S2), GHG Protocol, SBTi, ISO 14001, ISO 14064-1, and Environment Act 2021 requirements such as Biodiversity Net Gain.

Do you support ESG software or digital compliance tools?

Yes. RSustain UK develops and deploys ESG and environmental compliance tools, including digital legal registers, carbon data platforms, and ESG diagnostics to support ongoing compliance and reporting.

What training and certification programmes are offered through RSustain Academy?

RSustain Academy offers practitioner-led ESG training programmes, including ESG Foundation and ESG Masterclass courses, as well as ISEP-accredited certifications delivered in collaboration with an official ISEP training partner.

Who are RSustain UK’s services designed for?

RSustain UK works with corporates, infrastructure developers, investors, and organisations seeking regulatory-aligned ESG, Net Zero, and environmental compliance solutions across the UK and Europe.

Why is it important for CSRD?

CSRD uses double materiality to determine which ESRS disclosures are relevant and therefore must be reported with evidence and controls.

How do we run a defensible assessment?

Use a structured methodology: stakeholder mapping, topic universe, risk/opportunity scoring, impact severity/likelihood, financial linkage, governance sign-off, and a documented audit trail.

Is double materiality the same as ISSB materiality?

Not exactly. ISSB focuses on enterprise value (financial materiality). Double materiality includes that plus the organisation’s impacts on society and the environment.

What is Double Materiality?

CSRD / ESRS cornerstone

Double materiality means you assess sustainability topics in two ways: (1) Financial materiality—how sustainability issues could affect enterprise value; and (2) Impact materiality—how your operations and value chain affect people and the environment.

Method (defensible) Request an assessment

Related: CSRD • ISSB (IFRS S1/S2)

Two lenses, one decision

Financial materiality

Which sustainability risks/opportunities could affect revenue, costs, assets, liabilities, or cost of capital?

Impact materiality

Where do you cause, contribute to, or link to significant impacts on people and environment across the value chain?

A defensible double materiality method

Define topic universe: ESRS themes + sector specifics + stakeholder expectations.
Map stakeholders & value chain: where impacts occur and where data can be sourced.
Score impact materiality: severity + scale + scope + irremediability; plus likelihood.
Score financial materiality: link to enterprise value; time horizons; scenarios.
Validate: cross-functional review + leadership sign-off + documented rationale.
Output: materiality matrix, disclosure index, data owner map, evidence plan.

RSustain UK supports advisory & implementation. No statutory assurance.

Make materiality audit-ready

We help you run a structured assessment, document the evidence trail, and translate outputs into ESRS/ISSB disclosures.

Discuss your assessment