Harding had been a regular in the team prior to Davies returning for a second spell as manager at the beginning of February.
The full-back might get his chance at The Den with Gonzalo Jara Reyes out for the remainder of the season with a knee injury and on-loan Chelsea defender Sam Hutchinson nursing a knock.
Irish winger Stephen McLaughlin is another who could come into the reckoning after getting valuable minutes under his belt in the development squad recently following an ankle problem.
Former Lion Darius Henderson will miss out on a return to his old club as the striker completes a three-match ban.
Forest head to London eighth in the table and two points shy of the play-off places after a six-game winless run.
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