The railway isn’t a charity - it’s a nice idea but it simply wouldn’t work. How are you going to fill that train?
Running a seaside special circa 1970s is neither innovation nor progress. It’s bringing back something that was barely viable even 40 years ago.
No there isn’t “bound to be a market”, you need to find it. This isn’t how businesses work. Which market? You tell us.
It has no potential - or at least, you haven’t shown it has. You can’t just say “well there’s bound to be a market”. This ticks all the boxes with a crayon:
1) Links secondary destinations not served by direct trains (for good reason)
2) Roudabout route
3) Open access mentioned
4) No business case specified
5) Strong whiff of nostalgia in reviving a dead concept
I don't know. You could always use a couple of 142s on it. Or really for enthusiasts, 3 sets of 142s, joined together with a 37 top and tailing it for no apparent reason to fill the untapped Bradford to Weymouth demand.
Judging by the "attractions" noted, the route of the train seems to be Bradford - Huddersfield - Picc Reverse (or Vic-Ordsall Chord - Picc) - Stockport - Stoke - Stafford - Wolverhampton - Worcester - Cheltenham - Bristol (Reverse) - Bath -Bradford - on -Avon - Westbury - Yeovil - Dorchester - Weymouth. I cannot see that journey taking less than 7 hours, even with available paths matching up.
You might as well just go to Leeds, get a train to Bristol and get one from there to Weymouth. Manchester users can get a train to London then to Weymouth quicker, get to Bristol with a change at Birmingham. In essence the entire idea of this route would be that it picks up the massive untapped demand in Bradford and Huddersfield, that would like a slow journey to Weymouth without changing.
Say that you have 200 people on a voyager (something likely to run this sort of route) are you telling me that 400 people everyday from Bradford and Huddersfield all year round want to go to Weymouth?
I am sure it would be very lovely behind some heritage loco as a railtour one day, however the slow train, with many stops at small places, just becomes slower and less attractive and if I was spending 7 hours travelling somewhere, I would want to be a lot further south than Weymouth.