Synopsis

Michael’s explorations continue through greater London. He begins on the city's southeastern edge, in the leafy and historic village of Chislehurst, where unexpected imperial connections intertwine with a shadowy network beneath the surface. There, he uncovers the story of a thriving mushroom farm that once flourished within the 22 miles of artificial passages and tunnels. With the outbreak of war, however, these caves transformed into one of the nation’s largest public air raid shelters, provid