Research and analysis
Draft Heathrow Expansion National Policy Statement Appraisal of Sustainability
Appraisal of potential social, economic and environmental impacts of the policy set out in the draft Heathrow Expansion National Policy Statement (HENPS).
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Details
The Appraisal of Sustainability (AoS) systematically identifies, describes and evaluates the likely significant social, environmental and economic effects of the draft Heathrow Expansion National Policy Statement (HENPS). It also analyses the reasonable alternatives to the Northwest Runway scheme.
The AoS informs policy preparation by ensuring that sustainability considerations are considered and clearly presented to decision-makers and consultees.
The AoS forms part of a wider suite of technical assessments undertaken to inform the draft HENPS, alongside the:
The Department for Transport (DfT) commissioned AECOM to prepare the AoS.
Updates to this page
Published 18 June 2026