Derby County have confirmed a new deal for one of their stars that helped lead a push towards League One promotion last season. The Rams have already been busy in the past week, securing plenty of transfer busy to bolster Paul Warne’s squad. Ben Osborn was the first Derby signing through the door, with the former Nottingham Forest man joining on a free transfer following the expiration of his contract at Sheffield United. Kayden Jackson followed as the first attacking addition at Derby, landing a two-year deal for the forward after he left Ipswich Town. Jerry Yates is the latest signing for De…