The only issues with this (other than the cost of hiring in the locos and stock, and training crews) would be whether DRS would be able to provide enough ETS-fitted 37s for the Cumbrian, Yarmouth, and these new S&C services without the reliability of the first two being compromised. Also, reversal at Leeds means T&T or DBSOs, and I'm not there's enough working DBSOs around.
Oh, and I'm sure those well-heeled folks who've moved out to Craven and Wensleydale would love to find that their train home is full of the more, ahem, "characterful" members of the enthusiast community!



All that realism aside though, if it happened I'd love it...
I confess I was being a little bit provocative/tongue-in-cheek with this idea - and the cost of training (let alone pathing and other difficulties) for 37s extended to Nottingham make it a bit unlikely it would ever happen.
Nonetheless, looking at the timetable (42) it made me realise that, despite what might be the best spread Northern Trains can do with limited resources, there are serious gaps at key times during the day - which must limit traffic potential.
In particular, while each end of the S&C has an early morning 'commuter' service, there is then a 3 hour gap in both directions, meaning what one might call the 'business' service ie a sort of comfortable 08.45-ish departure to the main city, simply does not exist.
In the evening, Carlisle has a 16.00 and 18.00 ish return commuter trains - which is pretty good, but out of Leeds there is nothing between 14.49 and 18.06.
In view of this, I find it quite remarkable that Settle is the number one station on the route for passenger numbers - with (roughly) 140,000 pax per year, or 386 per day.
I would imagine that, of these, a core number of 80-100 pax commute on the 07.28 to Leeds (and Bradford etc). (Anyone know?)
How many more would be attracted to use the train(s) if there were a) a better evening return service c 17.00 ex Leeds and b) a c 08.45 departure to Leeds?
A similar situation exists with what might be called the 'Appleby Group' - Kirkby Stephen (30,000 pax pa), Appleby (65,000) and Langwathby (25,000), ie 120,000 pax pa in total, or 330 pax per day.
yes, they can commute into Carlisle (and back) for an 08.30 start, but no convenient 'business time' train either north or south bound.
Definitely need more stock - so a cost involved - but if a set could be acquired for an 08.00-ish departure southbound from Carlisle (limited stop) and a 17.00-ish departure from Leeds (to get back to the OP's them) it would go a long way towards plugging these gaps, which would surely boost traffic figures all round.
What the stock would do in between - it could go on to Nottingham, Hull or sit spare in carriage sidings - is another matter.
If all this involved Craven and Wensleydale pax enduring a few 'colourful' bashers with Cl 37 badges n stuff, well, it might be a case of colourful bashers or no extra trains at all
