Environmental Outcomes Reports (EORs): How EIA is Being Replaced and the Roadmap for Implementation

The UK Government plans to replace Environmental Impact Assessment (EIA) with Environmental Outcomes Reports (EORs), introducing an outcomes-based environmental assessment system aligned with national environmental targets and supported by a phased implementation roadmap.

Environmental Outcomes Reports: What the New System Means for Environmental Assessment

The Government is proposing a major reform to environmental assessment in England by replacing Environmental Impact Assessment (EIA) and Strategic Environmental Assessment (SEA) with Environmental Outcomes Reports (EORs).

The reform aims to move away from a system focused primarily on documenting impacts toward one that measures whether development contributes to clear environmental outcomes, such as biodiversity recovery, improved water quality, and progress toward net zero.

The Main Changes

A shift to outcomes-based assessment: Under the current EIA regime, the focus is on identifying and mitigating environmental effects of a particular project. The proposed EOR system instead assesses development against government-defined environmental outcomes, linking planning decisions more directly to national environmental targets.

Alignment with national environmental priorities: EORs will be tied to wider environmental policy frameworks, including climate targets and nature recovery objectives. This means assessments will measure how development contributes to these strategic environmental goals, rather than simply assessing impacts on environmental receptors.

A simplified and more proportionate process: The Government intends the new framework to be simpler and more efficient, reducing duplication and the production of lengthy Environmental Statements. The aim is to support faster planning decisions while maintaining environmental protections.

Greater emphasis on monitoring and delivery: EORs are expected to place more weight on post-permission monitoring, ensuring that promised environmental outcomes are actually delivered rather than relying solely on assessment before permission is granted.

The Roadmap to Implementation

The transition from EIA and SEA to Environmental Outcomes Reports will be implemented in phases. This year, the Government will prepare the detailed regulations, guidance and digital systems needed to support the new assessment framework. From 2026 onwards, the EOR system is expected to begin replacing the existing EIA and SEA requirements across planning and infrastructure regimes.

What This Means for Developers and Planning Professionals

For applicants and planning professionals, the direction of travel is clear: environmental assessment is likely to become more strategic, more data-driven, and more closely linked to national environmental targets. Rather than focusing primarily on documenting impacts, the new system will increasingly require projects to demonstrate how development contributes to measurable environmental improvements.

Read more about the Government's changes here.

Environmental assessment is likely to become more strategic, more data-driven, and more closely linked to national environmental targets