BAA
Heathrow Connect had a complex operating structure: Heathrow Airport Holdings (formerly BAA) supplied the rolling stock and on-board staff through its Heathrow Express subsidiary, and owned the track from Airport Junction to the terminals. GWR collected the revenue for journeys between Paddington and Hayes &amp; Harlington, while Heathrow Airport Holdings collected the revenue for journeys between Hayes &amp; Harlington and Heathrow.