The dispute concerns the Draft Chemicals (Health and Safety) (Amendment, Consequential and Transitional Provision) Regulations 2026, which the UK government laid before Parliament on 24 February under the draft affirmative procedure, according to the House of Lords Library. The Library briefing says the instrument covers changes to post-Brexit chemical regulation, including Great Britain's classification, labelling and packaging regime for hazardous substances.
The classification system determines which substances are identified as hazardous, what warnings appear on labels and whether bans or controls may follow, according to the Guardian. The HSE consultation proposed a route for recognising chemical hazard classifications from other jurisdictions, and the Guardian reported that Fighting Dirty argues the final regulation text does not preserve earlier assurances about alignment with European Union standards.
The government position is that the draft regulations simplify a regime inherited from EU law. The House of Lords Library says ministers argued that existing procedures were time consuming and costly for the HSE and business, and that the changes would allow the regulator to prioritise evaluations most relevant to the Great Britain market while keeping health, environmental and socio-economic priorities in view.
The counter-argument is about discretion and accountability. A Wildlife and Countryside Link briefing, joined by environmental organisations, says the draft instrument could allow the HSE to consider classifications from states and territories that have adopted the UN Globally Harmonized System in different ways, and warns that those systems may vary substantially. Fidra, an environmental charity, says the instrument removes a six-month statutory deadline for HSE technical reports after European Chemicals Agency opinions and replaces it with a work-plan process without a fixed publication deadline.
The House of Lords Secondary Legislation Scrutiny Committee also raised the divergence question. According to the Lords Library, the committee said submissions from environmental organisations warned that decoupling Great Britain's classification regime from EU assessments and removing statutory time limits risked delays and divergence, and the committee recommended that peers seek further assurances from ministers.