[arista]

["Officers attended, alongside colleagues
from the Metropolitan Police Service
and the London Ambulance Service,
and the victim was taken to hospital
with life-threatening injuries."

London Ambulance Service added it
had sent ambulance crews, an incident
response officer and
London's Air Ambulance to the scene.

"We treated a man at the scene before taking him
to a London major trauma centre,"
a spokesperson continued.

A Southeastern trains spokesperson said:
"All of our trains are fitted with CCTV and we
will be providing this footage to the
British Transport Police to assist
with their inquiries.]