[Talk-GB] railway=rail + oneway?

[Dave F]

In my upkeep of railway stations I've come across a few railway=rail 
sections which are tagged as oneway=yes.

To check before I remove: Anyone know of a legitimate case where trains 
can *only* travel in one direction? Most of the national network have 
double direction signals to allow them to use the right hand track.
Some of the examples I've found end midway along a linear track with no 
junction & even a couple of buffered ends.

DaveF