Heathrow airport expansion proposals
On 18 June 2026 the Department for Transport (DfT) published the draft Heathrow Expansion National Policy Statement (HENPS), which provides a framework for how expansion might be implemented.
Documents to download
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Aviation:proposals for an airport in the Thames estuary, 1945-2014 (1MB PDF)
Since the 1940s, there have been a large number of proposals to build an airport near or in the Thames Estuary. This note outlines the various on-shore and off-shore proposals that have been put forward, but does not deal with Boris Johnson’s proposals for a new airport on an artificial island in the estuary. The Mayor of London’s proposals in this area are dealt with in a separate note, SN6144.
Background material on the issue is available on the Intranet.
Documents to download
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Aviation:proposals for an airport in the Thames estuary, 1945-2014 (1MB PDF)
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