The new regulation UK SI 2026/484 was presented to Parliament on 24 February 2026 and approved on 21 April 2026. Its stated purpose is to keep the post-Brexit chemical regime “robust, proportionate and fit for the long term”, amending three EU legislative instruments assimilated as GB national law after Brexit.
The three regulations affected are:
- GB BPR (biocides);
- GB CLP (classification, labelling and packaging);
- GB PIC (export/import of hazardous substances).
What Changes Under GB CLP with new UK SI 2026/484 regulation?
This is the most significant area for companies producing and maintaining SDSs for the GB market (England, Scotland and Wales).
- Removal of C&L notification requirements
From 21 May 2026, the obligation to notify the HSE of the classification and labelling of substances placed on the GB market is removed. Manufacturers and importers based in GB, or Northern Ireland suppliers directly supplying the GB market, no longer need to submit new or updated classification and labelling information. The obligation to notify the ECHA C&L inventory remains, however, for companies established in Northern Ireland placing substances on the Northern Irish market, as European CLP applies in Northern Ireland. - New GB MCL System for Harmonized Classifications
The regulation also introduces a revised approach for GB Mandatory Classification and Labelling (GB MCL). Under the new framework, the HSE will have greater flexibility to update harmonized classifications without requiring a formal legislative act each time. This could significantly accelerate regulatory updates and alignment processes. - Accelerated adoption of EU classifications
An accelerated assessment pathway is created to adopt EU classification proposals, except in exceptional circumstances. However, this fast-track pathway is only available for substances already classified under a regime that adopts the UN GHS on the same basis as the United Kingdom — which at this time means only the EU. - Simplification of the HSE Work Programme
The HSE will no longer be legally required to automatically consider all classification proposals from the EU risk assessment committee, including those relating to products with no interest to the UK market. Instead, it will be able to define a three-year GB work plan, subject to annual review.
Impact of UK SI 2026/484 on SDS Producers
For companies producing SDSs for the GB market, UK SI 2026/484 introduces several important operational implications.
Substance Classification
GB CLP remains the primary regulatory framework, but the process for updating harmonized classifications (GB MCL) becomes more flexible and potentially faster in aligning with EU ATPs.
Companies producing SDSs will therefore need to monitor the HSE GB MCL List closely, since updates may now occur without requiring formal legislative acts.
EPY continuously maintains and updates the GB MCL List within the Chemfinder module, allowing users of our software solutions to directly import updated harmonized classifications into their internal databases.
C&L Notifications
The removal of HSE C&L notification obligations only affects companies established in Great Britain and does not modify the underlying classification obligations related to SDS preparation.
New EU Hazard Classes
The regulation does not currently adopt the four new hazard classes introduced under the revised EU CLP framework, including endocrine disruptors and PBT/vPvB classifications.
The UK Government has indicated that future adoption will be assessed separately in relation to the UN GHS framework. This creates an increasing divergence between EU CLP and GB CLP, potentially leading to different classifications for the same product depending on the destination market.
Northern Ireland
For Northern Ireland, EU CLP obligations remain fully applicable.
Companies exporting to Northern Ireland must therefore continue to comply with EU CLP requirements and ECHA C&L notification obligations.
Conclusions on the New Regulation UK SI 2026/484 for Chemical Compliance in the United Kingdom
In summary: the regulation is primarily a maintenance exercise for the post-Brexit system, not a radical reform. For SDS producers, the most immediate operational change is the removal of C&L notifications to the HSE; in terms of the technical content of SDS, the short-term impact is limited, but the question of the new EU hazard classes and the Northern Ireland divergence remain open points to monitor closely.
Learn more during our FREE Webinar on UK SI 2026/484
Would you like to explore the topic in greater detail?
We will discuss the implications of the new regulation during our dedicated webinar organized together with our partner CIRS:
“REACH and CLP after Brexit: EU vs UK Framework”
📅 24 June 2026
🕙 10:00 AM
⏱ Duration: 60 minutes
🌐 Language: English
