UK REACH Update: What Does the New Alternative Transitional Registration Model Mean for Industry?
12 Aug 2026
On 30 March 2026, the United Kingdom (UK) government published its response to a major consultation on UK Registration, Evaluation, Authorisation and Restriction of Chemicals (REACH).
The UK has confirmed a significant shift in its approach to post‑Brexit chemicals regulation, opting for a less stringent system under its Alternative Transitional Registration model (ATRm). The main goal of the update is to reduce costs for industry while maintaining and aligning with European Union (EU) regulatory standards.
What Does the Alternative Transitional Registration Model Cover?
The ATRm applies to around 20,000 substances that were on the Great Britain market under EU REACH prior to Brexit. These substances required a transitional pathway into UK REACH, and the revised model aims to provide that without duplicating them unnecessarily.
A Divergence Away From Additional Data Requirements
In earlier post-Brexit proposals, the UK had requested that companies submit additional “use and exposure” data when registering chemicals under UK REACH. This requirement faced strong disagreement from industry players, mainly due to the high costs and legal complexities associated with accessing data already held under EU consortia.
By removing this obligation under the revised ATRm, the government aims to ease the burden on businesses while still requiring extensive data for products to remain on the market.
Significant Cost Reductions
One of the most significant outcomes of the UK’s revised ATRm is cost reduction. The government estimates that the new approach will reduce registration costs by around 70%, bringing the total expected cost down from £2 billion to approximately £600 million.
This marks a substantial reduction compared to earlier proposed UK REACH requirements, which had raised concerns about significant costs and effort.
What Do Companies Still Need to Do?
Despite the reduced data requirements, companies must still meet key obligations such as:
- Providing hazard conclusions for substances rather than the full study data;
- Providing use and exposure information (aligned with the updated UK REACH regulations, which no longer require supplementary data);
- Submitting chemical safety assessments and chemical safety reports; and
- Participating in substance information groups (such as EU Substance Information Exchange Forums) to support joint data submission.
Closer Alignment With the EU
The revised ATRm approach also includes increased alignment with EU regulatory decisions. The UK has indicated that it will follow EU regulatory decisions as a starting point unless there are strong, evidence-based reasons to diverge.
What Happens Next?
The UK’s updated REACH approach illustrates a balance between upholding regulatory standards and supporting industry. By reducing upfront data requirements and aligning more closely with the EU, the government has taken a step towards a more practical and cost‑effective approach.
However, while the revised ATRm provides greater clarity, it is still subject to further consultation. There is still uncertainty surrounding how frequently regulators will request additional data and how closely the UK will track future EU decisions.
In the meantime, businesses should monitor government consultations and guidance from the Health and Safety Executive. Industry bodies should also continue engaging with policymakers throughout the consultation process to ensure that the final framework is proportionate, practical, and aligned with the needs of businesses. As UK REACH continues to evolve, early engagement and planning will be essential for managing compliance risks and adapting to future changes.
