The Type 23 proposal was eliminated in November 1987, with the other two going into a development phase where the designer partnered with an Australian shipbuilder: Blohm + Voss with AMECON, and Royal Schelde with Australian Warship Systems.
Type 23 designet blev sorteret fra i november 1987, mens de to tilbageværende gik ind i en udviklingsfase hvor designbureauerne gik sammen med australske værfter, Blohm + Voss med AMECON, og Royal Schelde med Australian Warship Systems for at færdiggøre forslagene til fregatterne.