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Regulatory Compliance Analyst | EU/UK Product Compliance & Risk Mitigation
Regulatory Compliance Analyst at Euverify with experience in EU and UK product safety requirements. Focused on risk assessments, technical file preparation, and regulatory mapping across diverse products. Brings a creative edge to compliance work, supported by a background in AI-driven research and analysis.
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EU Declaration of Conformity vs UK Declaration of Conformity: What Needs to Change?
If you sell regulated products in both the EU and the UK, it is easy to assume the Declaration of Conformity (DoC) can be treated as a single document and reused with minimal tweaks. In reality, post-Brexit conformity assessment now operates as two parallel systems. One is based on EU legislation and harmonised standards, and the other is based on UK legislation and UK “designated standards”, even where the technical requirements look almost identical.
The good news is that the two declarations are closely related, and in most cases they can be built from the same technical file and evidence. The risk is assuming they are interchangeable. Simply copying an EU DoC and changing a logo or reference can leave you with a declaration that does not align with the product marking, the applicable legislation, or the cited standards. These are exactly the kinds of inconsistencies market surveillance authorities look for during an investigation.
Below, we set out the real differences and the areas that remain aligned between EU and UK Declarations of Conformity.
What is a Declaration of Conformity?
A Declaration of Conformity is a legal statement made by the manufacturer, or in some regulatory regimes, by an authorised representative acting under a formal mandate. It confirms that a product meets all applicable legal requirements. In other words, the DoC is a document that must contain specific information, be kept up to date, and be kept up to date, and be made available to authorities on request.
In the UK, government guidance on UKCA marking explains that the UK Declaration of Conformity is broadly similar to an EU DoC, but it must reflect the relevant UK legislation and the UK conformity assessment route that has been used.
A DoC is often the first thing requested during:
- customs or border checks
- platform compliance reviews, such as those carried out by online marketplaces
- market surveillance investigations
- product incident investigations
The core difference is simple. An EU Declaration of Conformity is based on EU law, EU harmonised standards, and the CE conformity route. A UK Declaration of Conformity is based on UK law, UK designated standards, and the UKCA or other UK-specific conformity routes. Even where Great Britain still recognises CE marking, the declaration you hold must still match the legal basis you are relying on.
What an EU Declaration of Conformity must contain
Although the exact wording varies depending on the applicable directive or regulation, official EU guidance sets out a common structure that applies across product legislation. An EU Declaration of Conformity typically includes the following:
- Manufacturer details, including name and address
- Product identification, such as type or model and, where applicable, batch or serial number
- A statement of responsibility confirming that the declaration is issued under the manufacturer’s sole responsibility
- The applicable EU legislation, meaning the directives and or regulations that apply to the product
- References to harmonised standards and or other technical specifications used to demonstrate compliance
- Where required, details of the Notified Body involved, including its name, identification number, and relevant certificate references
- The place and date of issue
- The name and signature of the person authorised to sign on behalf of the manufacturer
EU guidance also makes clear that the Declaration of Conformity must be kept up to date and presented in a form that authorities can easily understand. This often implies language and translation requirements depending on where the product is placed on the market.
What a UK Declaration of Conformity must contain
The information required in a UK Declaration of Conformity is broadly similar to what was previously required for an EU Declaration of Conformity. However, the exact requirements can vary depending on the applicable UK regulations.
In practical terms, a UK Declaration of Conformity should include the same types of information as an EU Declaration of Conformity. This includes manufacturer details, product identification, the applicable legislation, references to standards, details of any Notified or Approved Body where required, and the signature and date. The key difference is that all references must align with the UK legal framework.
One of the most common and easily missed issues is how standards are referenced. In the EU, declarations cite harmonised standards, often EN standards. In the UK, declarations generally cite designated standards, which are the UK-adopted versions used for UK law. While the technical content of these standards may be identical, the legal basis for citing them is not.
EU vs UK Declaration of Conformity: What Stays the Same and What Changes
What is usually the same
- Product description and identification
- Technical evidence, including test reports, risk assessments, and technical file contents
- Core declaration structure, such as the statement of conformity, signature, and date
- Third-party conformity assessment evidence, where the same test results are valid for both regimes
What usually must change
- Legislation referenced
EU directives and regulations versus UK regulations retained and amended into UK law - Standards cited
EU harmonised standards versus UK designated standards - Conformity assessment references
EU Notified Bodies versus UK Approved Bodies, where applicable - Marking alignment
EU Declarations of Conformity must align with CE marking, while UK Declarations of Conformity must align with UKCA marking, unless a specific UK recognition or acceptance route applies
Great Britain Accepts CE for Many Products. Can You Ignore the UK Declaration of Conformity?
Not automatically.
Great Britain (England, Scotland, and Wales) now recognises EU requirements, including CE marking, across a defined range of product regulations. This removed the previous “end date” pressure and introduced longer-term flexibility for placing products on the GB market.
This position is set out in UK policy and underpinned by the Product Safety and Metrology etc. (Amendment) Regulations 2024, which came into force on 1 October 2024.
What this means in practice
In many regulated sectors, products may be placed on the GB market using either:
- CE marking based on EU requirements, or
- UKCA marking based on UK requirements
The route depends on the product type and the applicable regulations. However, your documentation must always match the route you are using.
A critical nuance: the UKCA “fast-track” route
UK guidance also allows a fast-track option. Under this approach, manufacturers can place products on the GB market that meet EU essential requirements and, where required, are assessed by an EU-recognised body, while still applying the UKCA mark.
In this case, a UK Declaration of Conformity is still required, but it may reference compliance with relevant EU legislation rather than UK-specific regulations.
So the real question is not:
“Do I need one or two declarations?”
It is:
- Which legal route am I relying on for each market?
- Does my Declaration of Conformity correctly reflect that route?
Northern Ireland: the exception you can’t treat like GB
Northern Ireland follows a different regulatory framework from Great Britain. The UKNI marking applies when a product is placed on the Northern Ireland market and has undergone mandatory third-party conformity assessment by a UK body. In these cases, the UKNI mark is used alongside the CE mark, not on its own.
Practical consequences:
- A compliance strategy for Great Britain does not automatically work for Northern Ireland
- You may need separate documentation and declaration logic for Northern Ireland, depending on the conformity assessment body used and the applicable product legislation
- If you sell into Northern Ireland, it should be treated as its own compliance pathway, not simply “UK as usual”
Sector caveat: medical devices have their own timelines and rules
Medical devices are a special case and are subject to specific MHRA rules and transitional timelines for CE-marked devices in Great Britain. The applicable end dates vary depending on the type of device and the EU legislation under which it was certified. These timelines and conditions are set out in UK government guidance from the MHRA on regulating medical devices.
If your product is a medical device or an in vitro diagnostic, do not assume that the general UKCA and CE approach applies in the same way. Instead, follow the MHRA regulatory route and ensure that your declaration and certificates align with that route.
Common mistakes that cause preventable compliance problems
- Using an EU Declaration of Conformity for products marked with UKCA, which creates a mismatch between the marking and the legal basis
- Citing EN harmonised standards on a UK Declaration of Conformity without confirming the correct UK designated standard reference
- Failing to account for Northern Ireland requirements and UKNI marking conditions where they apply
- Assuming that “CE accepted in Great Britain” means a UK Declaration of Conformity is not needed, when in reality this depends on the conformity route and the specific product legislation
- Allowing declarations to fall out of date after design changes, updates to standards, supplier changes, or regulatory updates
Do you need separate EU and UK Declarations of Conformity?
In most cases where products are placed on both the EU and UK markets, the answer is yes. Maintaining both an EU Declaration of Conformity and a UK Declaration of Conformity is usually the clearest and lowest-risk approach. It helps ensure that:
- references to legislation are correct
- references to standards are correct
- enforcement expectations are met in each market
That said, the correct documentation approach is not identical for every product. Great Britain continues to recognise EU requirements in certain areas, and the UK has specific conformity routes, including provisions that allow UKCA marking based on EU legislation in defined circumstances.
As a result, the appropriate set of declarations ultimately depends on:
- your product category and the legislation that applies to it
- the marking route you are using, such as CE, UKCA, or CE plus UKNI
- the conformity assessment pathway you have followed
Final Thoughts
A well-prepared Declaration of Conformity is not just a template exercise. It is a clear, structured summary of the legal and technical evidence that supports your conformity claim. If the declaration does not align with your target market, cited standards, or chosen marking strategy, you can have flawless testing and documentation and still fail a compliance check.
If you want a reliable starting point, Euverify provides up-to-date, regulator-aligned templates for both markets. You can access our EU Declaration of Conformity template and their UKCA Declaration of Conformity template to help ensure your declarations match the applicable legal framework from the outset.
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