Tower bridge unveils new glass floor across high level walkways long anticipated feature is world first for visitors we are thrilled to unveil our brand new and spectacular glass floor across the bridges high levelwalkways the most significant development to the exhibition since it first opened in 1982 launched in the west walkway today the glass floor offers visitors a never seen before view oflondon life from 42 metres above the river thames look down to spy road and pedestrianli