Understand what the NHS Evergreen Sustainable Supplier Assessment requires, check your current readiness and get practical support where expert review or delivery would help.
Practical sustainability support for NHS suppliers
GB Sustainability helps smaller businesses turn sustainability requirements into clear evidence, practical actions and usable submissions. Our work with NHS suppliers connects Evergreen with the evidence behind it, including carbon footprints, Carbon Reduction Plans and wider sustainability requirements.
Direct, experienced support
You work directly with Gareth from the first conversation through to delivery, so the advice stays consistent and grounded in your business.
What is the NHS Evergreen Sustainable Supplier Assessment?
Evergreen is NHS England's sustainability self-assessment for suppliers. It is completed through Atamis and gives suppliers a maturity level against current NHS sustainability priorities.
It gives the NHS a consistent view of supplier progress and reduces repeated requests for the same sustainability information. Suppliers can complete Evergreen if they already supply, or plan to supply, NHS England, an integrated care board or an NHS trust in England.
Evergreen at a glance
Suppliers complete the assessment through Atamis.
NHS England recommends completing it annually. The resulting maturity score is valid for 12 months.
Significant updates can be made during the year.
A supplier self-assessment
GB Sustainability can help you interpret the requirements, review evidence and support completion. We do not award an official level or guarantee how an NHS buyer will use your assessment.
The answer depends on how you supply the NHS. Evergreen is not used in exactly the same way across every procurement route, so start with the tender, framework or buyer requirement in front of you.
NHS Supply Chain tender
From 6 April 2026, NHS Supply Chain requires suppliers submitting tenders to have achieved Evergreen Level 1 at tender close.
NHS England Medicines tender
Suppliers tendering for contracts or frameworks administered by NHS England Medicines Value and Access need a valid Evergreen assessment at the point of submission.
Annual reassessment
Your Evergreen maturity score is valid for 12 months, so an existing assessment may need refreshing before a new opportunity.
Changed evidence or requirements
A new Carbon Reduction Plan, updated emissions footprint, organisational change or revised maturity criteria may alter what your existing evidence supports.
Preparing for April 2027
New NHS Carbon Reduction Plan requirements begin from 1 April 2027 and expand carbon reporting for many higher-value procurements and new frameworks.
Have a live tender or deadline?
Tell us what you are being asked for and we can help identify the most proportionate next step.
Evergreen uses four maturity levels. They build from a current Carbon Reduction Plan and core emissions reporting towards broader global carbon coverage, independently validated targets and stronger modern-slavery evidence.
Level 1
Build the NHS baseline
A current, published Procurement Policy Note-aligned Carbon Reduction Plan; a UK Net Zero commitment by 2050 or earlier; Scope 1, Scope 2 and the required subset of Scope 3 emissions; board-level approval; and Greenhouse Gas Protocol-aligned reporting.
Level 2
Broaden the carbon boundary
Scope 1, Scope 2 and all relevant Scope 3 emissions across the global business boundary, with a 2050 or earlier Net Zero target and the same core publication, approval and reporting controls.
Level 3
Strengthen targets and evidence
A 2045 (or earlier) Net Zero target, independent target validation and GHG emissions verification for the reporting entity, plus a public Modern Slavery Statement and a completed Modern Slavery Assessment Tool.
Level 4
Extend across the global organisation
Independently validated 2045 Net Zero targets and verified GHG emissions for the reporting entity and global parent (where relevant), higher-performer transparency reporting (e.g. B-Corp, CDP or EcoVadis), and active supply-chain mapping or investigation & mitigation of modern-slavery risks.
Use the levels as a maturity map, not a substitute for the assessment
This is a practical summary of the April 2026 criteria, not the full questionnaire. Current NHS guidance and the specific procurement documents should be checked before relying on a level for a live tender.
Choose the help that matches where you are
You do not need to know which service you need. Start with the situation that sounds most like yours, and choose only the level of support that would genuinely help.
A useful place to start
Not sure what support you need?
Free NHS Evergreen Readiness Check
See what your answers appear to support, which evidence needs confirming and the priority gaps for your target level.
Readiness matrix • Priority gaps • Matched next steps
GB Sustainability has supported Ferndale Pharmaceuticals with Evergreen work on several occasions alongside wider carbon and sustainability work.
That experience matters because Evergreen draws on evidence such as Carbon Reduction Plans, emissions data, governance and modern-slavery information. Practical support needs to connect the assessment with the underlying documents.
Our approach is to review what already exists first, preserve evidence that is still useful and focus effort on gaps that genuinely affect the requirement.
"As a pharmaceutical provider, we are facing increasing expectations from both clients and legislation. Working with GB us the structure, guidance and confidence to really move things forward.
"This has strengthened our ability to meet the sustainability requirements increasingly expected within the NHS and larger client tender processes, putting us in a much stronger position when bidding for new opportunities."
Roisin Wood
Executive Director, Ferndale Pharmaceuticals Ltd.
Support for wider NHS supplier sustainability requirements
GB Sustainability can also help with the Carbon Reduction Plans, carbon footprints and modern-slavery evidence that NHS tenders and frameworks may require. We start with the procurement route and identify only the gaps you need to close.
Carbon Reduction Plan
Level 1 already depends on a current published PPN-aligned Carbon Reduction Plan. The NHS also applies separate CRP requirements through procurement.
April 2027 NHS Carbon Reduction Plan requirements
New higher-value procurements and new NHS frameworks move to broader global carbon reporting, subject to the procurement documents and proportionality.
Carbon footprint
Incomplete calculations or the wrong organisational or Scope 3 boundary can mean the CRP and Evergreen evidence need rebuilding.
Modern slavery and MSAT
Modern-slavery evidence affects higher Evergreen maturity and can also arise separately through NHS procurement risk controls.
What is the NHS Evergreen Sustainable Supplier Assessment?
Evergreen is NHS England's sustainability self-assessment for suppliers. Completed through Atamis, it gives a maturity level against current NHS sustainability priorities and creates a more consistent way to share information.
Do all NHS suppliers need Evergreen?
Not every NHS procurement uses Evergreen in exactly the same way. Any supplier that provides or plans to provide goods or services to the NHS can complete it, but the requirement depends on the procurement route.
Do I need Evergreen Level 1 for an NHS Supply Chain tender?
Yes. NHS Supply Chain states that from 6 April 2026 suppliers submitting tenders must have achieved Evergreen Level 1 at tender close.
How long is an Evergreen score valid?
NHS England recommends annual completion and states that the maturity score is valid for 12 months. Significant updates can be made during the year where appropriate.
What is the difference between Evergreen Levels 1, 2, 3 and 4?
Level 1 establishes the CRP and UK emissions baseline. Level 2 broadens global carbon reporting. Level 3 adds a 2045 target, validation, verification and stronger modern-slavery evidence. Level 4 extends higher-maturity requirements across the global organisation.
Can we complete Evergreen ourselves?
Yes. The assessment is designed for suppliers to complete themselves. The free Readiness Check helps identify evidence and next steps; paid support is available only where review, technical work, time saving or hands-on support would help.
What evidence do we need for Evergreen?
It depends on the level and circumstances. Common evidence includes a current CRP, emissions calculations, published net zero commitments, approval and measures; higher levels add validation, verification, modern-slavery, MSAT and supply-chain risk evidence.
What changes for NHS suppliers in April 2027?
Updated proportionate NHS CRP requirements begin on 1 April 2027. The 2027 tier applies to procurements of £5 million per annum and above, including VAT, and to new NHS frameworks unless judged not relevant or proportionate.
Does Evergreen replace the Carbon Reduction Plan requirement?
No. A Carbon Reduction Plan is part of the evidence behind Evergreen, but the NHS also applies CRP requirements separately through procurement.
How does modern slavery fit into Evergreen?
Level 3 requires a public modern slavery statement and MSAT; Level 4 adds active supply-chain mapping or investigation and mitigation of identified risks. Separate NHS procurement requirements can also apply.Contact us for an informal discussion about how we can help.
Can GB Sustainability guarantee that our evidence will be accepted?
No. We can improve evidence quality and help prepare or complete the assessment, but NHS England, NHS Supply Chain and the relevant contracting authority control their own requirements and acceptance decisions.
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