Just to clear things up, what prompted my thoughts about Ripon is that the ECML between York and Northallerton is the straightest in the country and yet it has only one station 21 miles away from York and 7 miles away from Northallerton where the Middlesborough line joins.
Clearly if your going to speed up any part of the rail network, the flatter and straigher the better. To me it just seemed rather silly to have fast services slow down everything on your slow lines, especially when it may be possible to take them off the slow lines altogether, so your slow can essentially become two (faster) slow lines.
When I was looking at the Ripon line nearby it got me thinking if it could be changed, initally by using the Ripon line as it was once. (I discounted this idea later as although it could work with minimal impact from the North it would be far worse from York.) Naturally I was thinking of reinstating the line to the centre of Thirsk as well so that some services from Middlesborough could run to Thirsk without touching the ECML.
Also whilst looking at Thirsk it became apparent that to remove the foot crossing, would require a substantial rebuild of half the station and realignment of the down slow. I'm all for 140mph and I can't imagine this happening with foot crossings in place. With so much undeveloped land below the existing station, naturally if you wanted to raise line speeds across all four tracks then that is the best location for a new station, that could even use the existing overbridge as pedestrian access.