Guidance

Proposals for Heathrow expansion: information for potential promoters

Details of assessment criteria, submission details and the deadline for proposals for Heathrow expansion.

From:
Department for Transport and The Rt Hon Heidi Alexander MP
Published
30 June 2025

Documents

Letter to potential promoters of Heathrow expansion

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Details

This letter to potential promoters of Heathrow expansion follows on from the Chancellor鈥檚 invitation for proposals for a third runway to be brought forward by this summer.

The letter outlines essential information that is required in plans brought forward as proposals may be used to inform the Airports National Policy Statement review.

The criteria cover:

  • airport scheme design
  • expected timelines
  • costs and revenues
  • ownership, financing and funding
  • deliverability
  • environmental implications and planned mitigation

Next steps

See Heathrow expansion: next steps for promoters, the Secretary of State for Transport鈥檚 follow up to this letter, 22 October 2025.

Updates to this page

Published 30 June 2025

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