Nottingham Forest boss Stuart Pearce has no intention of sending fit-again striker Dexter Blackstock out on loan.
Bryan Ruiz found himself frozen out at Fulham under Felix Magath, but will be offered a clean slate by Kit Symons.
The 18-year-old has put pen to paper a one-year deal, with the option of a further 12 months.
Preston has been with the Blues academy for over five years.
He had a loan spell at Skrill North side Worcester City last season where he made two first-team appearances for the Dragons.