With 'Canterbury', Diamond Head went for a far more exhaustive and progressive approach. After previously establishing a heavy rock perception that was both powerful yet thoughtful, vocalist Sean Harris and guitarist Brian Tatler, the band's visionaries, shook everything up by introducing more complex and challenging ideas into the music. Harris' vocals and melodies are sublime and his lyrics thoughtful and his delivery is powerful. Tatler's compositions are stunning, his guitar work exceptional, subtly underplayed so as to match the conceptual framework of the album. There were two singles to be released from this album, which were "Makin' Music" and "Out Of Phase". With their third effort they made serious step into progressive metal.