The Register reports three display anomalies at Heathrow, based on sightings from its readers. Departure boards are meant to show flight destinations and times.

One screen displayed a Windows activation watermark behind departures for Milan and Cairo, and its date was incorrect. Another showed one page dated September 21 and another dated September 12. Days later, a third display exposed a network dialog and taskbar that resembled Windows 7 beneath the signage interface.

Heathrow also has a British Airways Concorde preserved at the airport. Concorde left service in 2003, when Microsoft was two years into the Windows XP era.