Its amazing that 16 hours later the entire national media have completely failed to pick up on the story. The only thing they care about is the protest in Clapham.
Would you prefer it if the media were 'all over it' shouting hysterically about how dangerous trains are? Despite statistics saying otherwise.
Basically, there is no news story, certainly not a national one, I suggest not even a regional one, merely local.
A rail vehicle over-ran (reasons as yet unknown and to be investigated);
it hit something solid;
there were no serious injuries to staff or passengers or bystanders;
there is ongoing disruption whilst it is cleared up.
Only the last line is newsworthy, and then less so because of reduced travel due to Covid restrictions.
If this were a road accident, it wouldn't merit a mention either.