unused tunnel and station left
<a href="//commons.wikimedia.org/wiki/User:SMP" title="User:SMP">User:SMP</a>
2013-11-16 14:09:17
Based on other similar images in Public Domain, namely <a href="//commons.wikimedia.org/wiki/File:BSicon_utBHF-R.svg" title="File:BSicon utBHF-R.svg">File:BSicon utBHF-R.svg</a> and <a href="//commons.wikimedia.org/wiki/File:BSicon_extBHF-L.svg" title="File:BSicon extBHF-L.svg">File:BSicon extBHF-L.svg</a>