Sharp played twice for the Blades, both as a substitute

Initially the 19-year-old could not agree personal terms with the Iron but eventually put pen to paper.

He has signed a three-year deal at Glanford Park and goes straight into the Scunthorpe squad to face Nottingham Forest on Saturday.

The deal could see Scunthorpe pay up to �100,000 for the frontman depending on clauses inserted in the transfer.

Sharp, who scored nine times in 16 games on loan at Rushden last season, had also been offered a new deal by the Blades.