Two tube trains almost collided during the rush hour last Friday. The Piccadilly and District line trains almost collided between Ealing Common and Ealing Broadway at around 6pm last Friday evening. The driver of the District line train which had stopped after going through a red signal was given permission to move on when a Piccadilly line train crossed the track immediately in front of it. A signalman has been relived of his duties following the incident and an investigation has now been launched to find out what went wrong.