"It'll be great going back," said the former Reds star.
"I'm pleased that Forest have taken that first step up.
"There have been a lot of changes there since I left, but there are a lot of good people at the club and it's been a difficult time for them.
"When you look at things they've achieved in the past it has been hard for the Forest fans, but hopefully they can build towards getting back up with the top clubs again."