The London Underground (also known as the Tube or the Underground) is a public metro system serving a large part of Greater London. The system serves 270 stations and has 402 kilometres (250 mi) of track. In 2012/13 London Underground carried over 1 billion passengers.

Since the 1970s, photographer Bob Mazzer has been documenting life in th Tube. Back then Mazzer worked as a film projectionist, a job that saw him travelling home late at night.

It was 1976 when Mazzer purchased a Leica M4 with a 35mm lens that his photography started to blossom. It wasn’t until many years later that Mazzer realized how extensive his collection of underground photos had become.

The culmination is a soon to be published hardcover book entitled, Underground. The 192 page book is being published by Spitalfields Life Books and will be released 12 June 2014.

[Sources: Spitalfields Life, Daily Mail, the Telegraph]