Interesting, thanks very much for that. I will have a full read of your blog and the source document when I am home on the computer.
On the subject of a new station, I tgith the best solution is the least interesting - to find a way to expand car parking at Barnetby. This could be done by taking land currently used by one of the disused goods yatdy, or even buying land from the agricultural haulage company who reside on former railway land.
Extra car parking could also be arranged at Habrough, even if it involves some land purchase.
The downside of a new station would be an increase in journey time and an increase in operating costs.
The one case I could see for a new station would be if demand at Humberside Airport took off, in which case I would agree with your proposed site near the A18 bridge. A bridged travelator link could be built to the terminal, which itself might need to be enlarged.
A second service to Doncaster could quite easily be gained by extending the Scunthorpe stopper. This would be better though if it were retimed such that it provided a more eveble spaced service, rather than the current arrangement of the trains leaving Doncaster 5 minutes apart.
We shall see what form Northern Powerhouse Rail takes, if indeed it happens.
On a similar subject, Transport for the North have produced a new document, focussing on central Manchester but focussing on the impact across the north.
https://transportforthenorth.com/wp-content/uploads/Item-5-Central-Manchester-Report.pdf
The report recognises that punctuality in the north of England, Merseyrail apart, is the worst in the country.
It also recognises that the line to Manchester Airport and the line between Manchester Picadilly - Stockport appear to be able to be classified as 'congested infrastructure'.and that delays from congested areas around Manchester ripple out across the north.
We frequently see TPE trains to Cleethorpes and often, as a direct consequence, Barton Line trains, delayed as a result of this congestion and indirectly by the officially conjested infrastructure in the Castlefield Corridor, on which trains from Liverpool are frequently delayed, causing knock on delays in the Hope Valley.
There are long term proposals to improve capacity in all three areas, however in the short term it may be necessary to temporarily reduce some services around Manchester in order to make the timetable more resillient and thus improve punctuality.