So the question is: what is the best way to sign rolling stock?
Hi! The best way is to start with small portions Like one new vehicle for the whole system so we will be able to describe it in the most correct way. Please also attach any detailed info about those vehicles, it can be any blogs posts or fan articles in case of missing wikipedia pages.
Thanks for the information, I would like to see exact class issue - I guess it's about 201 class, and yes we should use separate classes in this case IE 201 and NIR 201 (with 208/209 or 8208/8209).