School self-evaluation is receiving increasing attention in England, partly as a result of changes in the Ofsted inspection framework giving greater prominence to what schools can do to speak for themselves. The relationship between internal self-evaluation and external inspection was a theme in a high profile policy speech made by the Schools Standards Minister, David Miliband, at the North of England Conference in January 2004. As part of a ‘new relationship with schools’ heralded in the speech, Miliband articulated critical friendship in terms of a ‘school improvement partner’. This article draws upon a number of research projects to critique these proposals, especially in respect of the role of a critical friend in school self-evaluation. Issues discussed include different models of self and external evaluation, the importance of context, and the various ways in which a critical friend can support school self-evaluation. [ABSTRACT FROM AUTHOR]