The 29-year-old former Derby and Leicester ace joined the Maine Road club on deadline day last season, and exactly a year later, Platt tried to lure him to the City Ground and help his side achieve what he had done with The Citizens - win promotion to The Premiership.
Since their elevation to the top flight, Prior has fallen down the pecking order at Maine Road following the arrivals of Richard Dunne and Steve Howey who have cemented their places at the heart of the City defence.
He has since become frustrated at Maine Road and met with City boss Joe Royle for talks regarding his future at the club.
"I had a chat with the manager while we were away last week and he knows I am not happy with my position sitting on the sidelines," Prior said.
"Forest were interested in signing me, but nothing came of it and I am still here hoping to battle my way into the side. It is up to me to keep my head down now and then see what happens in the summer.
"We have got eight games to go, so I can't be much more patient. I want to play football, the manager knows that.
Royle admits he is happy with his first choice centre back pairing of Howey and Dunne which leaves Prior facing a struggle to get back into the first team, with Paul Ritchie, Danny Granville and captain Alfie Haaland also competing for places at the back.
The City boss Royle says he does sympathise with the predicament Prior currently finds himself in.
"It's been a frustrating time for Spencer, but that is what you have a squad for," Royle said.
"Spencer came here and helped us over the line at the end of last season and, overall, he has done well for us. I have no complaints about Spencer but I think that Dunne and Howey have done well together as a pair and Spencer has been the one who has suffered."
