Well, I think it might....
Surely that doesnt solve anything?
At present the actual end time for getting on a train timed to depart at xx:05 may be anything from xx:02 onwards; this is determined, apparently, not by a rigid timing but by the train staff. The result is that customers are uncertain whether they have enough time to catch the train in question. Uncertainty is, IMHO, a bad thing which leaves a sour taste in the mouth when things do not go according to plan.
If the same train was shown in the public timetable as "departing" (or perhaps even rename it "doors close") at xx:02, then there is no uncertainty in the mind of the customer - that is when they have to be on board by. There is then ample time for the full departure procedure to be carried out before actual departure at xx:05. As far as I can see, the only down side to this is the apparent lengthening of the time between departure and arrival, which seems to be an issue. I would venture that TOCs are effectively lengthening that period anyway (with the up to 3 minutes procedure), while still maintaining that their timetable is "faster".
