TWTD understands Town have told central defender Chris Smith and a number of academy scholars that they will be released at the end of the season.
Smith, last season's U23s skipper, signed a one-year contract last April with an option for a further season which the club have chosen not to exercise.
The 21-year-old, who has been out of U23s action of late due to injury, made one first-team appearance for the Blues, at Crystal Palace in the Carabao Cup last season, having come through the academy.
The former Kesgrave High School pupil spent much of last season on loan at Chelmsford City in the Vanarama National League South and had a short spell with Aldershot in the division above at the start of this campaign.
Meanwhile, academy scholars Mitchell Ware, Ross Marshall, Luca Vega, Kian Ronan and Ashton Henry have also been told they will not be kept on at the end of the season.
Ware, 19, is a goalkeeper from Grays in Essex who was recently on loan at Haverhill Rovers, while Marshall, 19, and Vega, 18, who has been with Town since he was seven, are both central defenders.
Harlow-born right-back or midfielder Ronan, 18, is currently with the Gibraltar U21s squad, while Henry, 18, is also a right-sided full-back and has been with Town since the U10s.