Quadding Huddersfield to Standedge. Also mentioned above, this was remodelled, actually in 1979 not the 80s and the speeds lifted. Micklehurst reinstatement. As mentioned earlier, missing viaduct, housing, etc? Modern freight motive power and the dramatic reduction in freight volumes means that pathing is much less of an issue on the Standedge route - but there is a better and totally obvious solution to the TP problem. Electrification of both Standedge and Calder lines.
1) Need I mention that Network Rail are investigating the re-opening of the disused sandledge tunnels.
2) The Micklehurst loop doesn't have any housing built on it's trackbed, if the remainder of it is reserved for future rail use now, then it can be re-instated when it is needed.
Remember what the asperations for cross pennine links are, as stated in the Northern Hub:
4tph Fast between Victoria and East of Leeds
2tph Semi-Fast from Piccadilly to Leeds via Guide Bridge (Pic - (GB) - Staly - Hudds - Dews - Leeds City)
One may also safely assume that there is still a massive increase in demand for stopping services allong the route, and if there where service improvments and station re-openings this demand would only increase further, especially in the Saddleworth commuter belt, due to the quality of roads.
So one may further assume...
2tph all stations.
Now, with 4 platforms at Stalybridge, fast through lines (the fasts' first stop will be Huddersfeild, semi fasts will call) and 2tph all stations to either Victoria or Piccadilly. You can see why as much 4 track as possible will be needed.
The Calder Valley will be seeing (If I'm remembering right) 4tph to Todmorden, and 3tph to Leeds, possibly increased to 5 and 4tph.
Vic - Todmorden - Burnley - Blackburn
Vic - Todmorden - Halifax - Bradford Interchange - Leeds 2tph
Vic - Todmorden - Brighouse - Dewsbury - Leeds
And I'm sure I've seen...
Vic - Todmorden - Brighouse - Huddersfeild
mentioned.
Now... As the fast services will be running from Victoria there will be the option of running them via the Calder Valley, but, this route is slightly slower, and it would currently mean a reversal at Bradford Interchange.
However,
If everything east of the tunnels is 4 track, and more platforms provided at Stalybridge, and the line is electrified between Leeds and Manchester (with onward electrification of course, but this is mainly so the stoppers can be electric) then it should be possible to just maybe slot the stoppers between the fasts between the East Portal and Stalybridge. Life would be much easyer with 4 track and the Micklehurst route open again though. It would also provide some much needed redundancy, and the chance to start again with some new stations on the Miklehurst route, that is much closer to some of the town centres.