A second series of the Secrets of the London Underground show has been commissioned by UKTV to be shown on the Yesterday channel next year.

The series will reunite Siddy Holloway from London Transport Museum with rail historian Tim Dunn (The Architecture The Railways Built), to explore hitherto unseen areas of London’s Underground network.

London Transport Museum’s director Sam Mullins OBE said, “The first series of Secrets of the London Underground proved a huge hit for the Museum and we can’t wait to see Siddy and Tim back for a second series. They’ll be taking viewers behind the scenes to discover even more hidden sites and little-known stories from the rich history of the Tube and how it’s shaped the Capital.”

The first series of Secrets of the London Underground launched to a record-breaking 659,000 viewers, with the opening episode becoming Yesterday’s biggest ever launch of a new series, the channel’s highest-rated programme ever and the 2nd highest rating non-terrestrial programme of the day.

The second series will air on Yesterday in 2022 and will also be available to catch up on UKTV Play.


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  1. Brian Butterworth says:

    Best thing on terrestrial TV this year! Always nice to be treated like an adult as a viewer and so lacking on the usually padding.

    Also, I’m been reading books about this stuff since I was a kid and I learnt lots of new things here!

  2. Hamilton Cork says:

    Did they pay Geoff for the name?

    • Sarah mc says:

      Probably about as much as Geoff paid for every other “secrets of the xxxx” tv show that went befure his YouTube videos

  3. Mike Oxlong says:

    It was OK
    There were numerous historical errors in the first series. Hopefully they will do a bit more fact checking this time.

    They should Ask Geoff Marshall, Tony Wright or even Ask Subbrit

  4. Liam says:

    Loved these. They’re fun and really engaging. A second series will be very welcome.

  5. Jennifer says:

    I did really enjoy this series but not as much as ‘The Architecture the Railways Built’ which has created so much wanderlust in me and given me ideas of where to travel in the UK and on mainland Europe. So I fear that with this news, we won’t see a new season of ‘The Architecture the Railways Built’. Sob!

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