This article investigates the perceptions of former in-service Initial Teacher Training (ITT) trainees in the post-compulsory sector of the United Kingdom (UK), and identifies how they intellectualised the contribution that successful completion of ITT had made to their practice as teachers. Former trainees reported perceptions of such professional enhancement in three key ways. Firstly, they felt more connected with the sector, connected with their institutions and connected with the realities of teaching following their ITT. Secondly, they felt a greater sense of professionalism, and were able to carry more practical and pedagogical skills into the workplace. Finally, they felt a stronger commitment to their own continuing professional development.