This is the story of how Marc Gawley broke a Guinness World Record^TM - you can watch a video of the day here

It chronicles my attempt at the Tube Challenge - visiting all 270 stations on the London Underground network in as short a time as possible, in collaboration with Martin East. The challenge was first recognised in 1960, and according to Guinness the record had remained unbroken since 2009 at a time of 16hrs 44mins 16secs.

This is how I went about planning my assault on the record, a mixture of web research, on the ground reconnaissance, and some hefty analytics.