The ends of sidings and bay platforms are usually terminated with a buffer stop to prevent rolling stock leaving the end of the track. When sidings are re-laid with flat-bottom rails, as represented by the PECO TT:120 range of code 55 flexible track and turnouts, often the original buffer stops made of bullhead rail would be re-used, along with the short length of track to which they are attached. Examples of this can still be seen in various locations on Britain’s railway network.