The first entry is always the pin's source. Overall confidence is a weighted average of how firmly each reference supports the start and end times used above; a reference counts half as much for every 180 days older than the newest.
A target, per the source: consent is only aimed for "before 2030", after which "a third runway would then open by 2035".
Heathrow's own press release confirms its board "approved new investment to begin work on a planning application for a third runway," aiming to "secure planning permission by 2029 and have the third runway operational within a decade" - consistent with the pin's stored 2035 estimated opening date.
Bloomberg's own headline, "Heathrow's[2] £49 Billion Third-Runway Project Backed by Ministers," published 24 November 2025, reports the ministerial backing that preceded Heathrow's own announcement, supporting the pin's narrative, though a 403 error blocked retrieval of the article text.
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