This thesis investigated the morphology of gaps formed during the in-situ consolidated thermoplastic automated fibre placement (ISC-TP AFP) process. Through two experimental trials, gap features were parametrised using geometric metrics such as arc radii and void width. Several distinct morphological types were identified and consistently quantified. The effects of process parameters like consolidation force and layup speed were analysed, though some were obscured due to overshoot. The findings offer a robust framework for gap classification and pave the way for future studies linking morphological features to mechanical performance in ISC-TP AFP composite laminates.