Mark Mason/Paul Talling/Iphgenia Baal

Talling, the author of 'Derelict London' presents his latest book, 'London's Lost Rivers', alongside Mason, who has traweled the entire Underground network and detailed it in 'Walk the Lines', and budding British writer Baal talks about her debut novel 'The Hardy Tree: A Story About Gang Mentality', which is set in the nineteenth-century grounds of St Pancras Church and deals with the days when writer and (sometime) architect Thomas Hardy was commissioned to address the overflowing tombs.