If you walk from Hampstead Heath in the north of London to Blackfriars Bridge on the Thames, there is one thing you won't see – the River Fleet. In this week's episode, learn the fascinating history of this 'forgotten' river and how it is now completely underground. Hosted by Cassius Konneh, performed by Dame Joanna Lumley. Written by Ben Jacob, with sound editing by Will Jacob.

Podden och tillhörande omslagsbild på den här sidan tillhör Happened Here Media. Innehållet i podden är skapat av Happened Here Media och inte av, eller tillsammans med, Poddtoppen.