(02 Aug 2015, 5:14 pm)Coppercap40 wrote Loco in picture is 66428 first reports indicate that it is a write off due to damage at both ends plus the centre of the loco

Don't be silly. There's been locos in the past with more damage than that which have been returned to service.

66428 66305. 6K06 and 6K07. While I can guess what the cause is, I won't speculate on an open forum.
No DRS drivers involved and no serious injuries.