We’re Number 1!

Arriving at Chesham station, look for the black and white enamel plaque on the platform wall. Note the numbers 1/270 in the right-hand bottom corner.
The plaque is part of a permanent installation by the British artist Mark Wallinger called Labyrinth. It was commissioned by Transport for London in 2013 to celebrate the 150th anniversary of the London Underground. Every station on the Underground network – all 270 of them – has its own unique Labyrinth with a single route passing through it from the entrance marked with a red “X” to the centre.
Each Labyrinth is numbered according to its order on the route taken by contestants in the 2009 Guinness World Record Tube Challenge. The challenge is to visit all 270 London Underground stations in the shortest possible time, travelling by any means the participants choose.

On 14 December 2009, the winning contestants achieved a time of 16 hours, 44 minutes and 16 seconds. The route that they took formed the numbering sequence for the Labyrinth plaques at each station on the network. The trio started their epic journey at Chesham station: hence our Labyrinth 1/270. They finished at Heathrow’s Terminal 5, home of Labyrinth 270/270.
If you fancy having a crack at the record, 15 hours 45 minutes 38 seconds is the current time to beat.

The station opened in 1889 and is now a Grade II-listed building. The 3.89-mile distance between Chesham and Chalfont & Latimer is the longest distance between two adjacent stations on the Underground network, and at 25 miles northwest of Charing Cross, Chesham is the furthest Underground station from central London. It is both the northernmost and westernmost Underground station.