This CCTV footage shows the effects of a bit too much. I'm going to take a guess that the driver/guard saw her before leaving the station!
http://www.btp.presscentre.com/Photo-Library/Barnsley-CCTV-1f3b.aspx
http://www.btp.presscentre.com/Photo-Library/Barnsley-CCTV-1f3b.aspx