[Talk-GB] Historic railways and route=train - is this good practice?

[Tony Shield]

Guys

Wandering through OPNVKarte I noted a railway line running through 
Kielder Water - an impossibility, further investigation showed the 
railway ways as abandoned or razed and part of a relation 
https://www.openstreetmap.org/relation/8213509/history , the Riccarton 
and Hexham railway. I suspect it was being rendered due to the 
route=train tag being set in the relation even though state=abandoned is 
present.

There is a similar rendering for the similarly abandoned Solway Junction 
Railway - 
https://www.openstreetmap.org/relation/9220571#map=11/54.9165/-3.2530&layers=O

As these two railways have long being extinct is it correct for them to 
be route=train which I regards as current use,  or should they be a new 
thing such as route=historic?

TonyS999