Midfielder John Welsh (Achilles) and striker Stuart Beavon (concussion) are Grayson's only concerns but could feature against the Iron.
Joel Byrom has again stepped up his workload in training following hernia surgery but a place on the bench may be the best the former Stevenage midfielder can hope for, having been out of action since North End's February 2 defeat to Shrewsbury.
Graham Cummins was recalled to the Lilywhites' attack in the 1-0 Easter Monday loss to Crewe and will hope to retain his place along with Keith Keane, who was moved from right-back to midfield after the ploy worked as an effective mid-game tactical switch against Portsmouth on Good Friday.
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- Joel Byrom