Highly-rated keeper who signed his first professional deal in May 2012 and was rewarded with a new two-and-a-half year contract last February.
Ingram earned his first call-up to the senior squad for the npower League 2 clash with Shrewsbury Town in September 2010, replacing the injured Steve Arnold on the bench.
The teenager was also selected for an England goalkeeping training camp in January 2011 - the only representative from a League 2 club to be included.
Ingram gained valuable experience at Oxford City last season before being recalled by the Blues in March.
The 19-year-old made his professional debut in the 1-0 defeat to Accrington Stanley and went on to star in his eight appearances for the club, keeping three clean sheets.
Home shirt sponsored byHAP Architects
Change shirt sponsored by Janet Beeks.