[en] The authors consider a detector, using scintillating optical fibres, designed to directly detect the production and decay vertices of charm and beauty particles. The aim is to provide a detector which can be used in a fixed target spectrometer to achieve sensitivities in the range 10 - 100 events per nanobarn. With a simple change in geometry the same technique should also allow the search for and study of heavy flavour production in a colliding beam machine and hence perhaps a route towards the Higgs particle. First the ideas for a fixed target detector, are discussed and then the collider development. (author)