I don't wish to be a killjoy, but this isn't actually a fantasy thread!

Manchester Victoria to Blackpool South
via Yorkshire? (Although it makes an interesting change from the usual Blackburn to Blackburn circulars proposal that seems to reer its ugly head so often!) That's an end-to-end journey time of about two and a half hours that serves no particular purpose other than further inconveniencing passengers from the Colne branch; this would require six units. Coincidentally that's the same number of units currently required for the Blackpool South to Colne
and the new Man Vic - Todmorden - Blackburn services combined. Without having to buy any PPMs!
And one last comment before the thread goes too far off topic, the problem with the Colne branch is not the infrastructure per se: it's the fact that it's used by the same trains that use the Blackpool South siding. Gannow Junction to Colne takes 20 minutes. The problems are caused because incoming and outgoing trains
have to pass each other at Rose Grove because of timings
at Kirkham & Wesham. Timings there are fixed, and the rest of the timetable revolves around this. If the Colne trains started instead from Preston, a much more robust timetable could be drafted. But that really is for another thread in another section!]
Ok, do we know where the people who actually use the Colne branch want to travel TO? Manchester? Preston? Blackpool South?...I suspect quite a few just go to other E.Lancs towns. I doubt many want to go to Blackpool South apart from on Summer days out.
Perhaps the Blackpool South line should be run as a shuttle from Preston if this would improve reliability. My suggestion for a through working was that this is often promoted as a way of reducing terminal costs and obtaining better rolling stock utilisation. I gather that few trains will turn at Man Vic once all the improvements are implemented, with electric trains turning at Stalybridge and DMUs at Rochdale.
If the Rose Grove-Colne timing is 20min then a half hourly service could be provided as a shuttle from Rose Grove, with one unit if some way of turning it there could be found without conflicting with trains to/from the Copy Pit line. I really do think SELRAP is a daft proposal, a fantasy with ZERO prospect of implementation whereas increased frequency on the existing Colne branch could be achieved cheaply and quickly and benefit more people.