Derby County have a number of contract decisions to resolve once the season draws to a close, with one player in particular deserving of a new deal. Derby are within touching distance of reaching the Championship. Just a draw against Carlisle United on Saturday will see them clinch promotion. Behind the scenes however, transfer plans will be drawn up ready for the reopening of the window, as Paul Warne is expected to have several players depart at the end of their contracts. Derby boast the oldest side in League One, but the average age of their squad will be brought down dramatically if Dwigh…