Does EU Regulation 2017/821 apply to UK businesses after Brexit?

It depends on where you import. Great Britain importers are not directly bound — the operative provisions came into force one day after the Brexit transition ended. Northern Ireland importers are fully in scope. UK businesses that export 3TG or 3TG-containing products to EU customers are indirectly bound through contractual due diligence demands from those customers.

Why doesn't EU CMR 2017/821 apply to Great Britain?

Under the European Union (Withdrawal) Act 2018, only EU law that was operative before December 31, 2020 became retained EU law in Great Britain. The operative provisions of 2017/821 took effect on January 1, 2021 — one day too late — so they never became retained EU law in England, Scotland, or Wales.

What do UK businesses need to do if EU customers are asking for conflict minerals due diligence?

Align your supply chain processes to the OECD Due Diligence Guidance, complete a Conflict Minerals Reporting Template (CMRT) identifying all smelters, verify RMAP conformance for those smelters, and produce an evidence pack your EU customer can reference in their own disclosures. Auditraks automates this process.

Does EU Regulation 2017/821 Apply to Your UK Business After Brexit?

Last reviewed: April 2026

Short answer: If you import tin, tantalum, tungsten or gold into Great Britain, no — EU Regulation 2017/821 does not directly apply to you. If you import into Northern Ireland, yes — in full. If you export 3TG or 3TG-containing products to EU customers, it applies to them, and they will push those obligations down onto you through contractual due diligence demands. For most UK tungsten businesses, that third scenario is the one that matters.

This article explains why, and what to do about it.

What EU Regulation 2017/821 actually requires

Regulation (EU) 2017/821 is the EU Conflict Minerals Regulation. It governs importers into the EU of tin, tantalum, tungsten and gold — the four metals collectively known as 3TG — and their ores, when sourced from conflict-affected and high-risk areas.

In-scope EU importers must carry out supply chain due diligence that aligns with the OECD Due Diligence Guidance for Responsible Supply Chains of Minerals from Conflict-Affected and High-Risk Areas. That means five things in practice:

Establishing a management system with clear accountability and policies.
Identifying and assessing risk in the supply chain back to the smelter or refiner.
Designing and implementing a strategy to respond to identified risks.
Carrying out third-party audits of smelter and refiner due diligence practices.
Publicly reporting on supply chain due diligence annually.

Volume thresholds in Annex I of the Regulation determine which importers are captured. The thresholds are set to cover at least 95% of EU imports by volume of each mineral and metal — meaning almost everyone of commercial significance is in scope, while very small importers are not.

The Regulation has been in full operative effect since January 1, 2021.

How Brexit changed the picture

This is where the timing matters. The Brexit transition period ended on December 31, 2020. The operative provisions of EU 2017/821 — the provisions that actually require due diligence, audits, and reporting — did not take effect until January 1, 2021, one day later.

Under the European Union (Withdrawal) Act 2018, only EU law that was operative before the end of the transition period became “retained EU law” in Great Britain. Because the operative provisions of 2017/821 crossed the line a day late, they never became retained EU law. They do not apply in England, Scotland, or Wales.

Northern Ireland is a different case. Under the Northern Ireland Protocol to the Withdrawal Agreement, certain categories of EU law continue to apply in Northern Ireland. EU 2017/821 is one of them. The UK enacted the Conflict Minerals (Compliance) (Northern Ireland) (EU Exit) Regulations 2020 to set up the enforcement regime, and the Office for Product Safety and Standards (OPSS) is the designated UK competent authority.

The practical result is a split regime within a single country: in Northern Ireland, 2017/821 has the force of law; in Great Britain, it does not.

The three scenarios UK businesses face

Most UK 3TG businesses fall into one of three situations. Each has a different answer.

Scenario 1 — You import 3TG into Great Britain only

The Regulation does not bind you. You have no statutory due diligence, audit, or reporting obligation under 2017/821. You may still face other obligations — modern slavery reporting under the Modern Slavery Act 2015, for example, or voluntary ESG commitments you have made to your own customers — but the EU Regulation itself is not on your compliance register.

This is the cleanest scenario, and also the least common among tungsten businesses of any real size.

Scenario 2 — You import 3TG into Northern Ireland

The Regulation applies to you directly and fully, with OPSS as the enforcement body. If your annual import volume of any covered mineral or metal exceeds the Annex I threshold for that substance, you are subject to the full due diligence, third-party audit, and public reporting regime. Sub-threshold importers are out of scope.

This is a small group, but if it describes you, the obligations are serious and non-optional.

Scenario 3 — You export 3TG or 3TG-containing products to EU customers

This is where most UK tungsten businesses actually sit, and it is the scenario that causes the most confusion.

You are not directly bound by 2017/821. But your EU customer is. They will be asked by their own auditors and regulators to demonstrate due diligence back to the smelter and, where possible, back to the mine. They cannot demonstrate that without your cooperation. So they will push the obligation down the chain to you through contract.

In practice this means receiving — sometimes without much warning — a due diligence questionnaire, a request for a Conflict Minerals Reporting Template (CMRT) submission, a demand for smelter-level origin data, or a requirement to evidence RMAP conformance for the smelters in your supply chain. The EU importer needs this to satisfy their own obligations. If you cannot provide it, you are not non-compliant in UK law — but you are unattractive as a supplier, and the customer will look elsewhere.

What the UK government actually expects

The UK has not introduced domestic legislation for Great Britain that mirrors EU 2017/821. As of April 2026, none is in force.

The Foreign, Commonwealth and Development Office has published guidance that sets a clear expectation: businesses have a statutory obligation to comply with OECD due diligence guidance only in Northern Ireland, but the UK government expects all GB importers of 3TG to comply with the OECD guidance on a voluntary basis.

“Voluntary” here does not mean “ignored.” It means the UK has reserved the enforcement mechanism through OPSS and has signalled that domestic legislation aligning GB with the OECD framework is a credible future step. Businesses that treat the voluntary expectation as a dead letter are exposed to two risks: a customer base that increasingly treats OECD alignment as a baseline procurement requirement, and a policy environment that could turn “expected” into “required” at short notice.

What a due diligence request from an EU customer looks like

For Scenario 3 businesses — the majority — the compliance pressure does not arrive as a regulator’s letter. It arrives as a customer request, and the requests have become more detailed over time. Typical contents:

A signed CMRT (Conflict Minerals Reporting Template) at the company or product level, identifying all smelters and refiners in scope.
Smelter identifiers that can be cross-referenced against the RMAP Conformant Smelters and Refiners List maintained by the Responsible Minerals Initiative.
Country-of-origin data for each batch or shipment, traceable to the mine or concentrator where known.
Evidence that the smelter’s sourcing countries are consistent with the batch’s declared origin — an increasingly common check as due diligence matures.
Confirmation of your own due diligence management system, policy documents, and risk assessment methodology.
An annual statement or report that can be referenced in the customer’s own public disclosures.

Some customers go further and require an independently produced evidence package — a chain of custody trail, document hashes, and third-party audit references — rather than self-declaration.

How to respond without losing the customer

Three practical steps work for almost every UK 3TG business that finds itself in Scenario 3.

First, align internally to the OECD Due Diligence Guidance. This is the common denominator across EU 2017/821, US Dodd-Frank Section 1502, and most buyer-side ESG frameworks. Alignment here is not wasted effort — it serves every downstream compliance demand you will face.

Second, move from declaration to evidence. A completed CMRT is a declaration; it is only as trustworthy as the data behind it. EU customers are increasingly distinguishing suppliers who can produce the underlying evidence — smelter identifiers, assay records, origin documentation, audit references — from those who cannot. The distinction has direct commercial consequences at contract renewal.

Third, automate the evidence pack. Most UK tungsten businesses currently assemble due diligence responses in spreadsheets and email threads. This is slow, error-prone, and produces output that does not survive a serious audit. A structured chain-of-custody system that captures events at the point they happen — mine extraction, trading transfer, smelter processing, warehousing, export — produces a compliance package on demand rather than retrospectively.

The bottom line

EU Regulation 2017/821 does not directly apply to UK businesses importing 3TG into Great Britain. It does apply to Northern Ireland importers, and it effectively applies to any UK business that supplies 3TG or 3TG-containing products to EU customers, because those customers are themselves bound and will push the obligation down.

The honest answer to “does it apply to my UK business” is rarely “no.” It is usually “not directly, but practically yes — because your customer is bound, and your contract with them will be too.”

If EU customers are asking for due diligence evidence

Auditraks helps UK tungsten traders, processors, and manufacturers produce the compliance evidence EU customers are demanding — chain of custody, RMAP smelter verification, and a structured Material Passport your customer can drop straight into their own due diligence file.

Talk to Julian Shaw, founder

We'll show you what a compliant evidence pack looks like and how fast you can produce one.

julian@auditraks.com