Bletchleyite
Veteran Member
There are of course anomalies with such a system. There are anomalies with any system, but distance-based pricing is at least transparent about how they arise. What makes such a scheme difficult to implement nationwide is the difficulty of doing any kind of demand management except in a very crude way.
You probably don't need complex demand management on local and regional networks - the recent appearance of Advances on these types of service are just simple money-grabs by incumbent TOCs who aren't allowed to set TOC specific walk-up fares.
I would see us having a contactless/smartcard based system for these and a separate compulsory-reservation train-specific and fully yield-managed system for IC type services.