BTP officers were called to Riddlesdown rail station in Purley on Friday, 22 March after a report that a woman and a child had been struck by a train.
The incident was reported to BTP at 8.29am and was also attended by Metropolitan Police officers.
Medics from the London Ambulance Service also attended, but a woman and a child were declared dead at the scene.
The station has been temporarily closed while officers and medics deal with the incident.
More top news
Yorkshire Water says the tap water in Thorne, near Doncaster, is still not fit to drink after a contamination scare.
In December 2012, gunman Adam Lanza shot dead 20 children and six teachers in the Connecticut school, before turning the gun on himself.
The study, conducted by the European Banking Authority, looked at how much capital would be used up in adverse economic conditions.