A surgical template system for use.in working on a bone comprises: a tool guide block(2) comprising at least one guide aperture (200) for receiving and guiding a toolto work on a bone； locating means (1) comprising a plurality of locating members(6), each member having a respective end surface (61) for positioning againsta surface of the bone； and attachment means (3) for non-adjustably attaching thetool guide block to the locating means such that, when attached, the member endsurfaces are secured in fixed position with, respect to each other, for engaging differentrespective portions of the surface of the bone, and the at least one guide apertureis secured in a fixed position with respect to the end surfaces. Correspondingmethods of manufacturing a surgical template system, methods of manufacturinglocating means for a surgical template system, methods of fitting a prosthesisto a bone, surgical methods, and surgical apparatus are described.
