Secrets of the London Underground will return for a second TV series

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 Mus