UK REACH Compliance: Post-Brexit Chemical Guide¶
When the UK left the EU's single market, it established an independent chemicals regulatory framework — UK REACH — enforced by the Health and Safety Executive (HSE) rather than ECHA. DEFRA has since estimated that full transition to the UK REACH model could cost British industry over £2 billion in duplicative testing, and in May 2024 the government published an Alternative Transition Model (ATR) proposal to reduce that burden by accepting certain EU REACH data. The registration deadlines have been extended to October 2026, 2028, and 2030 depending on tonnage band — but the fundamental requirement has not changed: EU REACH registrations have zero legal standing in Great Britain.
UK REACH is now a distinct regulatory framework governing chemicals placed on the Great Britain market. If your company moves chemicals, mixtures, or articles containing substances of very high concern (SVHCs) between the EU and the UK, you are navigating two separate regimes. On the Sustalium platform, UK-specific registration is the single most misunderstood requirement we see — companies consistently assume their EU REACH dossier covers the UK market, and they are consistently wrong.
What Is UK REACH?¶
UK REACH (the UK Registration, Evaluation, Authorisation and Restriction of Chemicals) was established after Brexit to replace EU REACH (Regulation [EC] No 1907/2006) for the Great Britain market. It is enforced by the HSE rather than the European Chemicals Agency (ECHA).
The core obligations under UK REACH are structurally similar to EU REACH:
- Registration: Manufacturers and importers must register substances manufactured or imported in quantities of 1 tonne or more per year.
- Authorization: Substances on the UK Authorization List require HSE authorization for specific uses.
- Restriction: Substances on the UK Restriction List are subject to specific limits and conditions.
- SVHC communication: Articles containing SVHCs above 0.1% w/w must be declared to downstream users and, upon request, to consumers.
Key Differences: UK REACH vs. EU REACH¶
| Aspect | EU REACH | UK REACH |
|---|---|---|
| Regulator | ECHA (European Chemicals Agency) | HSE (Health and Safety Executive) |
| SVHC Candidate List | Maintained by ECHA (~240 entries) | Maintained by HSE; currently mirrors EU list but can diverge |
| Only Representative | EU-based OR for non-EU manufacturers | UK-based OR for non-UK manufacturers |
| Registration deadlines | 2018 staggered deadlines (completed) | Extended deadlines: batches due Oct 2026, Oct 2028, Oct 2030 |
| DUIN submissions | Not applicable | Required to grandparent EU REACH registrations into UK REACH |
| Northern Ireland | EU REACH continues to apply | UK REACH does not apply (NI Protocol) |
Who Needs to Comply?¶
Scenario 1: EU Manufacturer Exporting to Great Britain¶
If you manufacture chemicals in the EU and sell to UK customers, you need: - A UK-based Only Representative (OR) to register your substances under UK REACH - If you submitted a DUIN (Downstream User Import Notification) before the deadline, your grandparented registrations are valid until the registration deadline for your tonnage band - If you missed the DUIN deadline, you must register before importing additional quantities
Scenario 2: UK Importer Sourcing from Outside the UK¶
If you import chemicals, mixtures, or articles from the EU or any other non-UK country, you are the legal importer responsible for: - Registering substances in quantities ≥1 tonne/year - Communicating SVHC content in articles downstream - Complying with authorization and restriction conditions
Scenario 3: Non-UK Manufacturer Selling to UK Customers¶
You cannot directly register under UK REACH. You must appoint a UK-based Only Representative who assumes the registration obligations. The OR must have sufficient background in the practical handling of chemicals and maintain up-to-date information on the substances they cover.
Registration Timelines¶
The UK government has extended registration deadlines to give businesses more time:
| Tonnage Band | Registration Deadline |
|---|---|
| ≥1,000 tonnes/year | October 2026 |
| ≥100 tonnes/year | October 2028 |
| ≥1 tonne/year | October 2030 |
These deadlines apply to grandparented registrations (those with an active DUIN). If you did not submit a DUIN, you cannot place those substances on the GB market until a full registration is submitted.
Article 33: SVHC Declarations in Articles¶
If your product is an article (not a chemical preparation) but contains an SVHC at a concentration above 0.1% weight by weight, Article 33 requires you to inform your UK customers and, upon request, UK consumers within 45 days. This is where product-level compliance meets chemical compliance.
We see this most often with electronic products containing SVHCs like lead (in solder), DEHP (in PVC cables), or SCCPs (in plastic casings). A single component above the threshold triggers the obligation, even if the overall product weight brings the percentage down.
How Sustalium Supports UK REACH Compliance¶
Managing UK REACH alongside EU REACH means duplicating registrations, tracking two sets of SVHC lists, and maintaining two supply chains of documentation. Sustalium's REACH and RoHS compliance platform handles both regimes in one place.
- Dual-Regime SVHC Declarations: Enter your BOM or article composition once. Sustalium checks against the EU Candidate List and the UK SVHC list simultaneously, flagging any substance that requires disclosure in either market.
- OR and Representative Management: Link your EU REACH Only Representative and your UK REACH Only Representative to your product profiles, ensuring consistent documentation across both jurisdictions.
- Article 33 Communication: Generate structured SVHC communication letters for downstream customers in either the EU or UK format, with the correct legal references for each jurisdiction.
- Restriction and Authorization Tracking: Stay current with both ECHA and HSE restriction list updates. Sustalium alerts you when changes affect substances in your documented supply chain.
Simplify Your UK and EU REACH Compliance
Stop maintaining two separate REACH compliance systems. Manage EU and UK chemical declarations, SVHC tracking, and regulatory updates in a single platform.
With Sustalium, generate a complete REACH declaration for either regime for just €10 per document.
Frequently Asked Questions¶
If I already registered under EU REACH, do I need to register under UK REACH?
Yes. EU REACH registrations have no legal validity in Great Britain. You must either have submitted a DUIN (to grandparent your existing data) or complete a full UK REACH registration through a UK-based OR or as a UK importer.
Does UK REACH apply in Northern Ireland?
No. Under the Northern Ireland Protocol, EU REACH continues to apply in Northern Ireland. If you ship chemicals to Northern Ireland, you follow EU REACH rules, and ECHA — not HSE — is the relevant regulator.
What happens if the UK SVHC list diverges from the EU list?
Once the HSE begins independently evaluating and adding substances to the UK SVHC Candidate List, the two lists will diverge. A substance authorized under EU REACH may be restricted under UK REACH, and vice versa. You must monitor both lists. Sustalium's platform tracks both automatically.
Is a UK REACH registration a one-time requirement?
Registration is initially valid indefinitely, but the HSE can request updates. You must update your registration dossier proactively if there are changes in tonnage band, substance composition, hazard classification, or identified uses.
Last updated: July 11, 2026