1.  The inquiry is expected to look first at whether the driver of the outbound train ran a red light near the station.

2.  The speed of the outbound train, which had traveled about a mile from the Centennial Yard, was not released.

3.  But newspapers said the probe would look first at whether the driver of the outbound train ran a red light near the station.

4.  Thames Trains operated the outbound train.

5.  The train companies said their investigation would focus on the behavior of the outbound train, which may have gone through a red light.