Well, there is the matter of potential stock utilisation to undertake an ORCATS raid.
It's already looking like a path for one of the most lucrative morning services for Scotrail in the Central Belt will be switched to East Coast in early course.
If the 13:00 service from London can, with suitable stock, be extended North of Edinburgh to form the 17:26 service to Dunblane - that's income from another busy service.
At least it will release a couple of 170s to form the "Harry Potter" service to Fife.
I do really like the thought of boarding a Dunblane service at Kings Cross.