sentences:  He has previously played for England at under-16 and under-17 level.A product of the Leeds United academy, Gardner signed his first professional contract with the club in 2006, then later penned a one-year extension on 19 June 2007.Previously a regular in the Leeds United reserve side, Gardner was involved with the first-team during the 2007–08 pre-season, including playing in a home friendly against Wigan Athletic.