A professional tour guide has revealed the meaning behind the blue and grey mosaic-style tiling at Green Park Underground Station in Travelcard Zone 1, a feature many commuters have overlooked. Jason, who works in the capital as a professional tour guide, shared footage on TikTok explaining that the tiles represent a hidden "code" designed to help passengers navigate the station.
In the video, Jason said: "So, here's a cool fact. If you go from the Piccadilly Line and transfer over to the Jubilee Line you will see this fun little code." He pointed out that the majority of the squares on the wall are blue to represent the Piccadilly Line, while some grey squares represent the Jubilee Line.
How the tile code works
Jason explained that as passengers walk further down the passageway, the squares begin to even out, showing how close they are to reaching their destination. "As you go further down, you start to notice the squares even out a little bit," he continued. "Then the squares start to show you how close you are to getting to your destination."
By the time passengers are near the Jubilee Line, the majority of the squares have transformed to grey. "Finally, as we get down to the line we can see they are all grey. So, if you see this code, it will help you know just how far away you are," Jason added.
Design history and inspiration
The tile design at Green Park serves as a nod to a larger platform tile motif at the station's Victoria Line, an abstract design by Hans Unger dating back to 1969. The London Transport Museum explains: "The design represents a birds-eye view of the trees in the park seen against the green background of the grass. The blue disc amongst the green black and yellow discs possibly represents the station site on the north side of the park."
The tile design was replaced by June Fraser's leaf-pattern design in 1979 when the Jubilee Line interchange was built, according to the museum.
Reaction from commuters
In response to Jason's clip, one TikTok user admitted: "I had done that journey many times and never realised that!" A second person said: "Was at Green Park changing from Piccadilly to Jubilee. This is a very clever pattern. It must have taken ages to put together."
A third enthused: "I do love seeing this when walking through Green Park! Lovely Piccadilly blue transitioning to Jubilee silver." While a fourth TikTok user exclaimed: "Very cool fact." The design continues to intrigue passengers, offering a subtle wayfinding aid that many have only just discovered.
