It doesn't matter, the times are still similar and most WCML trains do not go through Brum. The point isn't about the exact times though in my experience those times are more or less correct. Liverpool is almost as close to London in travel time as it is the Birmingham. Shall I drive to Birmingham - 2 hrs or get the train to London - just over 2hrs. The point is that Birmingham will never replace London as an event destination no matter how much Birmingham exceptionalism you apply. The sheer mountain of industries you'd have to change to achieve that is insurmountable. Birmingham would obviously get a few events, it already does, a new stadium increased capacity stadium with multi roles isn't going to change that. The versatility would be wasted money. Birmingham already has the NEC for a very large, well connected high capacity indoor venue, it doesn't put on that many events of the nature we're talking about