21-year-old Lancaster who was released by Premiership side Spurs featured in the 1-1 draw against Chester FC and the 1-0 defeat against Wolves at the weekend.
In both games the Camden born striker struggled to impress with Steve Davis saying that he needed to really work on his fitness after being dogged by injury over the last few seasons.
While fellow trialist Ibra Sekajja who was released by Crystal Palace at the end of last season featured in the 1-0 defeat against Macclesfield Town also failed to impress the management team.