I spoke to a representative of Network Rail earlier this week. He confirmed the near miss, and apologised for the mistake which led to the potentially dangerous situation. He said they were undertaking an eqnuiry and would proceed to disciplinary action if appropriate.
I said I understood the need for manual override of the automatic system of controls from time to time. What I did not understand is why the manual override allowed the controller to keep the gates up whilst the train signal was green, not red. Surely even in manual override mode they should have a fail safe system so if the gates were up the signal was red. I urged them to come to new operational procedures to make manual override a safer process, by preventing all clear be given to both cars and train for the same crossing.
Network Rail promised to look into this and report back.