Bradford net Warnock on loan
Warnock, a versatile player who can play anywhere along the back-line, has impressed in the reserve team this season and will hope to continue that good form with The Bantams in Division One.
At 20 the Ormskirk-born defender has time on his side and will hope to follow other homegrown talent such as Michael Owen and Steven Gerrard into the Reds first team.
Bradford have made a steady start to the new campaign with nine points from six games and they lie 12th in the Division One standings.
Meanwhile, Bantams striker Damian Hatton has been forced to retire from football after failing to recover from a broken leg and severe knee damage two years ago.
The 19-year-old suffered career-ending injury in a pre-season friendly with Bradford's youth side in August 2000.
Despite fully rehabilitating his injury back so Hatton is able to walk and run, the youngster has been advised to quit playing so as to avoid further deterioration to his leg later in life.
Hatton will be aiming to pursue a career as a fitness coach following his decision to hang up his boots.