Direct city centre to terminal trains between LHR and Oxford/Birmingham would be a start - worry about Manchester later.
Well said, if they provide a decent alternative for all the connecting pax, ie a fast rail line that comes direct into LHR then they can think about reducing domestic flights.
http://business.timesonline.co.uk/to...cle2982649.ece
If what is in the above article comes to fruition then more flights to relativly nearby places could be reduced.
But Governments take so long doing things it will be 2030 by the time any of this happens!!