East London Line
The St Mary's curve connection between the District line track and the East London Line was used for passenger traffic until 1941, but was subsequently only used to transfer empty trains to and from the other sub-surface lines. The curve was often lit and could easily be seen from the left-hand side of East London line trains entering Whitechapel station from the south, prior to the refurbishment of the East London line that commenced in late December 2007. The points on the District line, connecting it to the curve, were removed in summer 2008. Just west of Whitechapel is the site of the former station, one of the many closed London Underground stations.