None of these proposals do anything for the long-suffering residents of Bradford who've had the heart ripped out of their city centre. It's all very good looking at it from a railway 'wish-list' point of view, but the point of redeveloping Bradford city centre is other than to make it easier for people from Knottingley to get to Ilkley easier - and I can't believe that's much of a market in the first place!
Here we disagree. Bradford has now reached such a point of decline, and has lost so much of what were once its prosperous northern suburbs to the Leeds conurbation that it'd best hope now is to be a secondary centre for the 'Greater Leeds' area, in much the same way that Stockport is for Manchester. It's neither far enough away from Leeds or big enough to be able to command its own competitively-sized city centre.
Your plans seem to be (partly) to divert as many trains away from Leeds as possible. Trouble is - that's where most passengers want to go. Unless I'm misunderstanding your ideas, passengers from the Calder Valley Line would have to change to get to Leeds. Passengers from the Knottingley line wanting Leeds as their destination would have to go via Wakefield to Bradford and change there. Additionally the Knottingley - Skipton/Ilkely would either have to be DMUs or the wires going up to Knottingley - either way it's not gonna happen!
Reducing congestion at Leeds City is something that needs to happen. However, my plan doesn't see that happening. There would be at least 4tph Bradford Exchange - Leeds, 2 via Shipley and 2 via Pudsey. Plus with currently separate paths becoming interconnected (one train would run Leeds-Shipley-Bradford-Pudsey-Leeds) you'd be able to fit more trains into the existing paths, raising the prospect of a higher Leeds-Bradford frequency.
Passengers from the Calder Valley would have quicker Leeds trains, no longer reversing at Bradford, as well as more frequent trains into Bradford as the same number of units can run more trains on a shorter service.
Knottingley would (obviously) retain its direct service to Leeds via Pontefract. However, passengers for Ilkley or Skipton would be able to take a direct train and avoid Leeds.
Yes, this would require wiring to Knottingley, something I'd support under this plan. Also given it's a spur off the Hallam lane, and wiring the HL already has a pretty high CBR IIRC, it'd be (relatively) cheap.
Trains from Yorkshire can't terminate at Todmorden - there isn't the facilities - but also, why would you want them to? As for the East Lancashire services, what time they gained by avoiding the reversal at Bradford they would lose on the longer route to Leeds via Shipley. And the Bradford - Sheffield direct route avoids all other major towns en route! There may well be a market for through trains to Sheffield - but not without it calling at other places like Halifax and Wakefield as well.
Installing a turnback at Todmorden wouldn't (I'd imagine) be too hard. Also it's convenient, given Todmorden will be receiving extra services to Manchester once the Todmorden curve opens. Terminating at Todmorden reduces the likelihood of delays in Leeds affecting Manchester-Burnley services, which is a good thing.
Bradford-Leeds via Shipley comes in at 18 minutes without a stop at Frizinghall. The fastest services via Pudsey are 21. So there's no delay to running north out of Bradford, plus you increase capacity for a section of line which is best suited to solely stopping trains (entirely urban, steep gradients and low speed limits).
Bradford-Sheffield would run via Barnsley and Meadowhall as well as the Spen towns. I reckon probably an hourly service would suffice, plus at least an hourly Huddersfield-Sheffield fast service.
With a calling pattern of: Low Moor, Cleckheaton, Liversedge, Heckmondwike, Dewsbury Moor, Thornhill Lees, Horbury, Darton, Barnsley, Meadowhall & Sheffield it should be fairly well patronised.
There is probably something to be said in favour of reopening the Low Moor -Thornhill line. Cleckheaton, Liversedge and Heckmondwike are quite large towns and have expanded greatly since the line closed. A through train from Bradford Interchange to Wakefield via the Spen Valley would be useful and probably quite popular. But I don't really see any point in reopening the Bowling Junction to Laisterdyke line. I know it looks useful on paper and an obvious candidate for reopening, but there are as many passengers from Halifax (and west thereof) who get off at Bradford as do at Leeds. Either you have to halve the number of services to each seperate destination, or you'd have to run twice as many trains per hour. The former suits no-one and busy as these trains are I don't think there is suffiicient demand for a train every seven minutes from Halifax.
Yeah, and in both cases you increase frequency / reduce journey times.
2tph Leeds - Halifax / Caldervale with a now sub-30 minutes journey time.
4tph Bradford-Halifax (2 continuing to Huddersfield, 2 to Manchester)
Sorry if I appear hyper-critical: I know this is basically a fantasy thread (since there is zero chance of it happening), but surely the whole point of redeveloping Bradford city centre is to improve things for Bradfordians themselves. All these plans do is make it possible for 'out-of-towners' to avoid the city altogether and save a couple of minutes on their journeys.
I think we're in danger of 'spending' billions of pounds solving a problem that's just not that big a an issue anyway! And it's really
not that big a problem - ten minutes stretching your legs as you walk across town! (And for those of us who smoke - that's a very convenient break from railway premises!

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This isn't about redeveloping Bradford city centre, it's just a project that happens to be relocated there. It's a very beneficial project for the wider regional network, which while it would present opportunities for redevelopment in Bradford isn't solely designed for them.