What makes a station get managed by Network Rail?

[Russel]

The word was, that apparently GWR were doing such a poor job of maintaining Bristol Temple Meads station, that Network Rail decided to manage it themselves. Hence the slightly unusual arrangement of nearly all the station staff remaining GWR employees.

Originally, Bristol Temple Meads station was managed by FGW/GWR.

Bristol Temple Meads has been a run down dump of a station for many years, it was clear whoever was responsible for looking after it, wasn't.

 

[Transilien]

I remember Manchester Victoria and Manchester Oxford Road were supposed to be going over to Network Rail, Then it was dropped.

Glasgow Queen Street was also proposed to move to Network Rail at the time of the refurbishment and electrification. This never happened, just like the Manchester stations.