This article draws upon research undertaken with 28 teacher education mentors, managers and trainee teachers within the SW Centre for Excellence in Teacher Training (CETT) in 2008, following the introduction of the new revised Lifelong Learning UK (LLUK) standards. The first part of the article locates and contextualises the policy context in relation to the school and further education (FE) sectors. Two separate and distinctive models of mentoring practice are delineated, the first model as a source of formative support for trainee teachers, and the second model as a tool for the assessment of competence. The article concludes by suggesting that the danger and indeed unintended consequence of separating out these functions of mentoring is that an unnecessary dichotomy is created that dislocates coherent teacher practices from one another. It argues that what is needed is a sustained period of stability in the sector. This would leave a space for CETT professionals and others to promote those practices that will make a difference not only to the work of teacher educators but to the work of staff and students. (Contains 2 tables.)