High Quality Content by WIKIPEDIA articles! The Grayrigg derailment was a fatal railway accident that occurred at approximately 20:15 GMT on 23 February 2007, just to the south of Grayrigg, Cumbria, in North West England. The initial conclusion of the accident investigation is that the derailment was caused by a faulty set of points (number 2B), controlled from Lambrigg ground frame. The scheduled inspection on 18 February 2007 had not taken place and the faults had gone undetected.