== References ==
* A photograph showing a special train proceeding past the BR/SVR ground frames, C E Steele, 1979. Photograph uploaded to the RMweb forums. [http://www.rmweb.co.uk/community/index.php?/topic/77903-ground-shunting-signals-help-request-please/?p=1205923 Link]. Accessed 09/01/2015.