We know you love the Tube – our little stats wizard who lives in the cupboard and runs on cherry Tango tells us so (even if you also like to complain about it a lot). But there can be few people quite as out-and-out bonkers obsessed as Andrew Martin – journalist and author of ‘Underground, Overground: A Passenger’s History of the Tube‘. If you’ve read the book, you’ll be pleased to know that the man himself is hosting a Tube-themed talk on Wednesday July 11 at the Royal Festival Hall. Too lazy/poor/busy doing laps of the circle line to make it along? We had a chat with him to get a flavour of the underground things to come.