do not want to speculate at this early stage. the rail accident investigation branch are on site and they do their investigation and they will then hand over to the network rail team who will begin with the recovery of the train on site and then we need to repair the track. there is of work to do and at this stage we don't know the cause. once we have been able to assess the damage to the track, only then will we be able to give a reliable estimate time. ibi, we be able to give a reliable estimate time.— we be able to give a reliable estimate time. a matter of no contention _ estimate time. a matter of no contention that _ estimate time. a matter of no contention that there - estimate time. a matter of no contention that there was - estimate time. a matter of no - contention that there was something on the track, whatever it was and however it got there that caused the first train to derail which caused the collision?— the collision? honestly, i really don't know and _ the collision? honestly, i really don't know and at _ the collision? honestly, i really don't know and at this - the collision? honestly, i really don't know and at this stage . the collision? honestly, i really don't know and at this stage it | don't know and at this stage it would be wrong to speculate. there is all sorts of information coming out. but what we do have is huge confidence in the rail accident investigation branch. they are extremely thorough and they do their job very well and once we get a clear statement from them we will know where we are, but at this point