Capetonian
Develop BHX. It is under capacity, well served by road links and public transport and if HS2 happens, may be better served. It has a huge catchment area and loads of potential.
I lived near the Euston~Birmingham railway for 14 years (88~02). During that time, I was regularly travelling on biz and pleasure. My closest was LTN and LHR after that.
On mnay occaisions, I checked prices out of BHX and then included the cost of road or rail (I could have taken a taxi to Berkhamsted station and the direct train in under an hour to BHX station) and
not once did the cost every add up. It was always cheaper in money - or easier in time, to use LTN and LHR.
I have lived within 90 minutes of STN and BHS (East and West) and used STN a couple of times but never BHX. To make it work, someone will have to change their prices.