In Dyche’s case, a dressing room can be lost very quickly, after succeeding Ange Postecoglou to become Forest’s third permanent manager this season.

Dyche’s reign went downhill after a good start, with BBC sources suggesting he struggled to bond with some players who questioned his methods and tactics, as he focused on the squad’s physicality.

Players’ opinions were also canvassed after defeat at Leeds United and they did not give Dyche their full backing.

So how quickly can a dressing room turn against a manager – and could it even happen before he steps through the door?

Sutton said: “Players talk when a new manager comes in. Some players may have experienced that manager before, or there may have been fall-out. I think instant impact is important.

“Certain managers will go into a club and want to do things their own particular way. They may leave out a club legend who’s already there, or a strong character, then that person won’t be happy and might be influential in the dressing room.”

Murphy believes every manager gets a chance, but warned: “It can change within three or four games.

“It can happen after a few bad results and performances, when you feel like you’re really struggling, getting beaten heavily, not competing in games.

“So maybe a month. One of the difficulties is when you have a dressing room where there is a little bit of pushback because some players are OK with the manager.

“This can become toxic as well because what you don’t want is a group of players who feel differently, because then you don’t have that cohesion and togetherness.

“But I would suggest when it starts going wrong it becomes a majority quite quickly.”