 After making a substitute appearance in the first round of the League Cup at the start of the following season he was again loaned out, this time to League Two side Bury.Robertson made his Bury debut away to Darlington on 15 August 2009, scoring the only goal in a 1–0 win for Bury.Robertson's loan was cut short by Bury on 12 September 2009 after playing four games and scoring once.