Posted 5th April 2013 at 03:52 am
The midfielder signed a one-year contract with Blues (with a further one-year option) in the summer of 2013.
He had spent the previous six weeks at the club on an emergency loan from Barnet.
During that period, the former West Ham United trainee captained Blues U21s in the U21 Professional Development League Two North and made an appearance on the first-team bench for the final 2012/13 npower Championship fixture of the season.
Lee had previously enjoyed loan spells at Dagenham & Redbridge and Gillingham before signing for Barnet in the summer of 2012.
He is the son of former Newcastle and England midfielder Rob Lee.