I might be in the wrong thread- if so, please delete - and of course I lack insights into HS2. But: Are there specific reasons why there will be no connections between HS2 and classic lines at (near) Curzon Street (and indeed in Leeds; although I am aware that trains could run direct from York, but would miss Leeds)?
As far as I understand, there will be HS2-trains from Birmingham to Manchester and Leeds. In Central Europe (eg Germany - and probably even in France) these trains would run Scotland - York - Leeds - HS2 - Birmingham - Bristol and onwards; Same coming from Manchester.
Instead, there will be specific HS2-services running rather short distances and - apparently - separate, slower Cross Country Services running over classic lines and over longer distances, thus denying long-distance-passengers the time-savings that HS2 offers.
Since this does not make any sense from where I come from, is there any logical reason for this, apart from the fact that obviously not all connecting lines are electrified (which could be changed, of course).