Barry,
Had a quick look at your new site - I'm sure you models can be reproduced in Trainz, with no problem if you decide to give it a go again. The recent 'complications' with Trainz are not as bad as you might think, in my view the worst thing about them is the almost total lack of good documentation explaining them. Might be worth trying out a trial mesh or two from your existing Blender models just to see how it goes, if you like I'm willing to try the conversions for you (the copyright would of course remain yours).
I know the Leeds & Liverpool very well - I kept my boat in the basin at Apperley Bridge and later at Kildwick :
Above, rural moorings at Kildwick.
I travelled the L&L many times but always turned left at Wigan - in my days the section to Liverpool was a bit of a 'no go' area, completely 'Yuppified' now of course.
Chris