- The attack happened around 8am on Friday the 27th September
- The man is described as black and of scruffy appearance
- He was wearing a grey hooded jumper with the hood worn up
More top news
"All it takes is for somebody to see me - and I could just die, just like that. I could want to go to the shop and not come home."
Before the killing, Peters searched the internet for "serial killers", "treatment of child killers in prison" and "premeditated murder".
Arriva Rail North, Greater Anglia and South Western Railway are all affected.