You’ll discover a labyrinth of dark and dusty passageways which were once used by the travelling public, preserved vintage advertising poster fragments that have been concealed for over 50 years, see the iconic Leslie Green station (as seen on Yesterday Channel’s ‘Secrets of the London Underground’) and its surroundings before they are swept away forever, and learn about the newest innovations to a Tube and Network Rail station that serves over 42 million passengers each year.