If you use the tube, you are bound to have seen, without maybe even noticing it, this mosaic maze, behind every bench, on the platform of the Victoria line at Warren Street station...

It was designed by british graphic designer Alan Fletcher, described as 'a god amongs graphic designers'.

The Transport of London Museum explains that the idea of the maze came as a visual pun on the name of the station, as 'warren' refers to a network of underground interconnecting rabbit burrows. The artist's sense of humour extended to his designing a puzzle that would take on average more than four minutes to solve, after noticing that the waiting time between trains was of three...

How long will it take for you to solve it?