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Environmental impact assessment meaning

What does Environmental impact assessment mean?
An environmental impact assessment (EIA) is the statutory process used in planning and other consenting regimes to identify, evaluate and mitigate the likely significant effects of a proposed project on the environment before planning permission or other development consent is granted. It is defined in legislation: in England and Wales by the Town and Country Planning (Environmental Impact Assessment) Regulations 2017 (with sectoral EIA regimes, including for nationally significant infrastructure and marine works); in Scotland by the Town and Country Planning (Environmental Impact Assessment) (Scotland) Regulations 2017; in Northern Ireland by the Planning (Environmental Impact Assessment) Regulations (Northern Ireland) 2017; and in Ireland under the Planning and Development Acts and Regulations implementing the EIA Directive. Key features include screening (to determine if EIA is required), scoping, preparation of an environmental statement/EIA report (EIAR in Ireland), public consultation, assessment of reasonable alternatives, and a reasoned conclusion by the competent authority, with mitigation and monitoring secured by conditions or obligations. The assessment addresses likely significant effects on biodiversity, population and human health, soil, water, air, climate, cultural heritage, landscape, material assets and their interactions, including cumulative effects; social and socio‑economic effects are considered where relevant. Failure to carry out a required EIA renders a...
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NEWS
High Court quashes Norfolk Vanguard development consent for failure to assess cumulative impacts with Norfolk Boreas under EIA Regulations 2009: unlawful deferral and inadequate reasons (England and Wales)

Pearce v Secretary of State for Business, Energy and Industrial Strategy [2021] EWHC 326 (Admin) What are the practical implications of this case? While the facts are specific to this matter, multiple offshore schemes along England’s east coast are moving through consent, and each must robustly account for cumulative effects. The case also underlines mounting pushback from local communities against sizeable onshore infrastructure in the area, coinciding with BEIS’s programme reviewing offshore transmission and different approaches to linking offshore wind schemes and landing renewable power. The court further made clear that, even where a proposal aligns with government policy and helps deliver low‑carbon, renewable generation consistent with legal duties towards ‘net zero’ and tackling climate change, that alignment does not displace the requirement for any application to evaluate every impact properly and in accordance with the law. All such proposals therefore need to demonstrate, through the application process, that cumulative and project‑specific effects have been considered with sufficient rigour, rather than assuming policy support or climate objectives will...

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NEWS
EIA project definition: adjacent stand-alone schemes not one project; cumulative effects assessment suffices; procedural limits on amending JR grounds - Wingfield v Canterbury CC [2019] EWHC 1975 (Admin)

R (on the application of Wingfield) v Canterbury City Council [2019] EWHC 1975 (Admin) What are the practical implications of this case? The decision does not establish any new legal principle, but usefully reiterates settled law concerning what is commonly termed ‘salami slicing’. This describes breaking up a single development into smaller elements that fall beneath EIA thresholds, thereby sidestepping the need for an environmental assessment. Salami slicing has been found to be unlawful and should be avoided. The judgment confirms that defining the relevant ‘project’ for EIA purposes is a matter for the competent authority’s judgment, though it remains susceptible to challenge on grounds of Wednesbury rationality or other public law error. Lang J indicated that the following considerations are pertinent when deciding whether two schemes amount to a single project for the EIA regime: common ownership—two sites held or promoted by the same person may point to a single project (Larkfleet) simultaneous determinations—two applications considered and determined by the same committee on...

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NEWS
EU cross‑sector legal and regulatory updates: infringement package, consultations, Parliament positions, and developments in financial services, energy, environment, life sciences and AI (9 October 2025)

In this issue: EU fundamentals Commercial Competition and state aid Corporate Free movement, immigration and employment Financial services Energy Environment Life sciences Regulatory TMT Daily and weekly news alerts New and updated content Trackers EU fundamentals European Commission releases October 2025 infringement package The European Commission has unveiled its October 2025 infringement package, identifying the EU Member States facing proceedings for breaches of obligations arising under EU law. The dossier covers letters of formal notice, reasoned opinions, and referrals to the Court of Justice addressed to Belgium, Malta, Estonia, Austria, Poland, Portugal, the Netherlands and a number of additional countries. Actions relate to multiple instruments and rules, notably Directive 1999/31/EC (Landfill Directive), Directive (EU) 2020/2184 (Drinking Water Directive), and Directive 2011/92/EU (Environmental Impact Assessment (EIA) Directive), among related matters. See: LNB News 08/10/2025 39. ...

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PRACTICE NOTES
Waste planning law and policy in England: national framework, plan-making, development management, EIA, applications, conditions and obligations; interface with pollution control; with Welsh planning guidance

National policy 25-Year Environment Plan —the 25-Year Environment Plan outlines the government’s commitments to enhance the environment within a generation. The Environmental Improvement Plan 2023 (EIP 2023) for England was the first statutory update to the 25-Year Environment Plan under the Environment Act 2021 (EA 2021). On 1 December 2025, it was replaced by the Environmental Improvement Plan 2025 (EIP 2025), now the current environmental improvement plan for EA 2021 purposes. EIP 2025 renews the long-term framework for achieving environmental outcomes, revises the interim targets in EIP 2023 and adds two new interim targets. EIP 2025 is pertinent to waste planning as part of the broader policy to improve resource efficiency and drive the move to a more circular economy, complementing the Resources and Waste Strategy and the Waste Management Plan for England (see below). Resources and Waste Strategy The Resources and Waste Strategy sets out how the government intends to conserve material resources by cutting waste, promoting resource efficiency and moving towards a circular economy in...

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PRACTICE NOTES
Planning enforcement in England and Wales: breaches, investigations, discretion, time limits and immunity, notices and injunctions, appeals and criminal liability (including April 2024 reforms)

Breach of planning control and enforcement action Under the Town and Country Planning Act 1990 (TCPA 1990), any breach of planning control can be met with enforcement measures. For these purposes, a breach of planning control is understood to mean: undertaking development without the requisite planning permission — this presumes that an unauthorised operation or a material change of use has occurred which amounts to development within TCPA 1990, s 55, that such development requires planning permission, and that no permission has been secured When determining whether a breach of planning control has arisen in this context, the applicable guidance and case law on the meaning of ‘development’ must be applied; see Overview: Is planning permission required?...

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PRACTICE NOTES
Human rights due diligence for UK organisations: assessing, prioritising and managing impacts under the UNGPs, with stakeholder engagement, supply chain risks, remediation and reporting, and EU CSDDD context

This Practice Note contains guidance on assessing the risk of your organisation causing or contributing to an adverse human rights impact Human rights due diligence and risk assessment are not presently mandated by UK law; however, they remain a core element of the corporate responsibility to respect human rights under the UN Guiding Principles on Business and Human Rights (UNGPs). Adopting these practices is also sound business sense, helping to safeguard an organisation against operational and reputational risks linked to causing or contributing to adverse human rights impacts. In addition, particular facets of the responsibility to respect human rights may already be required by domestic legislation, such as health and safety, non-discrimination, or environmental laws. The EU Corporate Sustainability Due Diligence Directive, Directive (EU) 2024/1760 (CSDDD), further introduces compulsory human rights and environmental due diligence obligations for the largest companies within the European Union and, in some instances, for those operating outside it...

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