Police have appealed for information over a pair of "dangerous" men, after a shop keep was shot in the chest on Halloween. Investigating officer Detective Sergeant Gary Ferguson, of the Met's Flying Squad, said:
These men are dangerous and we need to find them urgently.
Although suspect one tried to cover up, you can see most of his face in the CCTV footage. His face is distinctive. We are sure that someone who knows this man would recognise him from the CCTV. Take a good hard look at his face - do you know him?
More top news
The victim ran along the platform with his friend when the attacker pulled out a knife and chased them both.
Spray cans were found near the bodies on tracks near a south London station.
Some 81% of passengers are satisfied with their journey, down three percentage points from spring 2017.