Whittingham cost City £250,000 in January 2007.
City have been linked to a move for Robert Earnshaw, the same player is also said to be attracting interest from newly promoted Forest.
One player that's possibly becoming a full tme City player is keeper Peter Enckleman. He's made the No. 1 shirt his own whilst on loan from Blackburn and now he could be about to make a permanent move on a long term contract. Enckleman's contract is up at Ewood Park this summer.