(30 Sep 2013, 6:57 pm)BJ10VUS wrote Bit of a downgrade from the high-spec Geminis though!
That's true but I was thinking GNE could combine the 21/X21 so they Interwork using the Hybrids.
So for example
21 to Durham - Every 15 Minutes - Then onto an X21 to Bishop Auckland - Every 30 Minutes, Basically what happens currently on a Sunday at higher Frequency.