About this programme
Tim Dunn and Siddy Holloway head to the sprawling Heathrow Airport underground stations - the first ever underground rail link between an airport and a city.
Programme listing
Secrets of the London Underground
Heathrow
Channel
U and Eden
U and Eden
Starts
Mon 27 Jul 2026, 15:00
Mon 27 Jul 2026, 15:00
Ends
Mon 27 Jul 2026, 16:00
Mon 27 Jul 2026, 16:00
Category
News & Documentary
News & Documentary
What time is Secrets of the London Underground on TV?
Secrets of the London Underground is next on U and Eden at 15:00 on Mon 27 Jul 2026.
Know when it’s back on
Create a free TVGuideUK account and set reminders for Secrets of the London Underground, series links and favourite channels — handy when you found us by searching what time it’s on.
What channel?
U and Eden
U and Eden
Start time
15:00
15:00
Ends
Mon 27 Jul 2026, 16:00
Mon 27 Jul 2026, 16:00
Channel numbers
FreeviewUK channel list57
SkySky Q / Satellite166
Virgin MediaVirgin TV176
FreesatUK channel list160Channel numbers are shown only from approved provider data and may vary by region, package or device.
Other airings
Sat 25 Jul
08:00Secrets of the London Underground
British MuseumU and YESTERDAYSat 25 Jul
09:00Secrets of the London Underground
West Ashfield & OvalU and YESTERDAYSat 25 Jul
10:00Secrets of the London Underground
Leicester SquareU and YESTERDAYSat 25 Jul
11:00Secrets of the London Underground
HeathrowU and YESTERDAYMon 27 Jul
09:00Secrets of the London Underground
West Ashfield & OvalU and EdenMon 27 Jul
10:00Secrets of the London Underground
Leicester SquareU and EdenMon 27 Jul
11:00Secrets of the London Underground
HeathrowU and EdenMon 27 Jul
12:00Secrets of the London Underground
Shepherd's BushU and EdenMon 27 Jul
13:00Secrets of the London Underground
West Ashfield & OvalU and EdenMon 27 Jul
14:00Secrets of the London Underground
Leicester SquareU and EdenMon 27 Jul
16:00Secrets of the London Underground
Shepherd's BushU and EdenMon 3 Aug
09:00Secrets of the London Underground
Acton WorksU and Eden
08:00Secrets of the London Underground
British MuseumU and YESTERDAYSat 25 Jul
09:00Secrets of the London Underground
West Ashfield & OvalU and YESTERDAYSat 25 Jul
10:00Secrets of the London Underground
Leicester SquareU and YESTERDAYSat 25 Jul
11:00Secrets of the London Underground
HeathrowU and YESTERDAYMon 27 Jul
09:00Secrets of the London Underground
West Ashfield & OvalU and EdenMon 27 Jul
10:00Secrets of the London Underground
Leicester SquareU and EdenMon 27 Jul
11:00Secrets of the London Underground
HeathrowU and EdenMon 27 Jul
12:00Secrets of the London Underground
Shepherd's BushU and EdenMon 27 Jul
13:00Secrets of the London Underground
West Ashfield & OvalU and EdenMon 27 Jul
14:00Secrets of the London Underground
Leicester SquareU and EdenMon 27 Jul
16:00Secrets of the London Underground
Shepherd's BushU and EdenMon 3 Aug
09:00Secrets of the London Underground
Acton WorksU and Eden