"Too early to speculate, but human error is a likely factor." Sounds like speculation to me.
http://ichef-1.bbci.co.uk/news/660/cpsprodpb/10316/production/_90362366_e91a7f50-36c4-4697-8863-aac8d8ea7ca6.jpg
Edited 1 time(s). Last edit at 07/12/16 11:02 by thetuck.