Western Rail Link to Heathrow (DFT) appears in one UK GMPP snapshot, 2021 Mar.
Cite: IPA / NISTA (Cabinet Office) (2026). UK Government Major Projects Portfolio (GMPP): Western Rail Link to Heathrow. Tollgate Data, https://data.tollgatehq.com/projects/uk-gmpp/westernraillinktoheathrow, as at 31 Mar 2026. Licence: OGL v3.