Supporters who previously have turned up to watch the players train, have been told they are no longer welcome.
Since the Ryton training complex was modernised last season to the tune of £0.5m, the training complex has become more and more off limits to supporters who used to enjoy watching the players put through their paces through the City management.
The club have said that: "The fencing is being put up to stop prying eyes from the opposition, it's not aimed at our loyal supporters but obviously it means no-one will be able to see."