During the interview with the Train Driver, he says he applied the brakes as soon as the car appeared in his view. However, during the opening video, the first sign we see something is wrong is at the moment of impact - there is no display of the train brakes being applied, as later stated.
The train is said to be a service from Portsmouth Harbour to London Waterloo, but the accident is said to have taken place at Streatham, but that line goes no where near it. No trains from Streatham serve London Waterloo.