UK REACH to follow EU rules: alignment becomes the default position

On 20 May 2026, the UK Government confirmed a significant shift in direction for chemicals regulation, signalling that UK REACH will now align closely with EU REACH, with divergence occurring only in very limited circumstances. This represents one of the most important strategic developments in the post‑Brexit evolution of UK chemicals policy.

The position was set out publicly at the ChemUK 2026 conference in Birmingham where Emma Hardy, a minister in the Department for Environment, Food and Rural Affairs (Defra), said the government will use EU rules “as a starting point for UK REACH, diverging only where really necessary”. For businesses that have spent the last several years navigating uncertainty and the risk of divergence, this is a notable and consequential clarification.

From independence to alignment

When UK REACH came into force in January 2021, it was largely a copy of the EU regime at that point in time. However, the expectation from many quarters was that the UK would gradually develop its own regulatory pathway, potentially diverging from EU approaches in areas such as authorisation, restriction and substance prioritisation.

In practice, maintaining a fully independent system has proven challenging. The UK inherited a regulatory framework without the underlying data held by the European Chemicals Agency (ECHA) and regulators have faced a substantial workload in attempting to replicate or replace elements of the EU system. At the same time, industry has raised concerns about the costs and complexity associated with operating in two parallel regulatory regimes.

Against that backdrop, the move towards alignment is not particularly surprising. It reflects both practical constraints and a recognition of the UK’s close economic and supply chain integration with the EU.

A pragmatic policy response

The rationale for alignment is explicitly framed in pragmatic terms.

Government statements emphasise the need to avoid “time‑consuming, costly and unnecessary duplication” of EU assessments, while providing greater certainty for businesses operating across both markets. The policy is also intended to enable new protections to be implemented more quickly and efficiently by drawing on decisions already taken elsewhere.

This is consistent with a broader shift in UK chemicals policy during 2026, including reforms to transitional registration requirements and the new approach to the SVHC Candidate List. Together, these changes point to a more resource focused, efficiency driven model of regulation.

For many businesses, particularly those with EU exposure, this should reduce compliance complexity. Data and regulatory intelligence developed for EU REACH can increasingly be leveraged in Great Britain, rather than duplicated.

However, the position is not one of full harmonisation. The UK retains the ability to diverge where justified, including for reasons such as national priorities or specific risk considerations. Additionally, Defra does not have the policy lead in all areas of UK chemicals regulation, including CLP and biocidal products legislation - instead, the Health & Safety Executive (HSE) leads in these areas and it has not made similarly sweeping statements about alignment, at least, not yet.

Implications for industry: clarity, but not simplicity

At a high level, the move towards alignment provides much needed clarity. It establishes a clear reference point for future regulatory development and reduces the strategic uncertainty that has characterised UK REACH since Brexit. In particular, it reinforces the importance of EU regulatory developments for UK market planning. Decisions on Candidate List additions, restrictions and authorisations taken in the EU are now more likely to be reflected in the UK, either directly or with limited modification.

That said, alignment does not remove all complexity. UK REACH remains a separate legal regime, with its own processes, timelines and administrative requirements. Businesses must still comply with UK specific obligations, including registration, notification and supply chain communication duties.

Crucially, the issue of duplicate data requirements has not been fully resolved. Companies may still face significant costs in generating, accessing or submitting data to support UK REACH registrations, even where equivalent information already exists under EU REACH. Industry estimates suggest that these duplication costs could be substantial, with wider implications for competitiveness and supply chain resilience.

In that sense, the policy addresses part of the problem, but not all of it.

A shift in regulatory philosophy

Beyond the immediate practical implications, this development reflects a deeper shift in regulatory philosophy. In the immediate post‑Brexit period, there was an implicit assumption that regulatory autonomy would be exercised through differentiation and, potentially, innovation. UK REACH was seen by some as an opportunity to design a more agile or proportionate system.

The move towards alignment suggests a different conclusion has been reached. Rather than pursuing divergence as an end in itself, the emphasis is now on efficiency, proportionality and international coherence.

This is not without merit. The EU REACH system is globally influential and highly developed, and alignment provides a degree of stability for both regulators and industry.

However, it also raises questions about the long term role of UK REACH as a distinct regime. If regulatory decisions are largely derived from EU processes, the UK system risks becoming, in effect, a rule-taker rather than a rule-maker.