I was looked up Derek Ford on the BBFC site and along with the usual suspects was 'Perverse Anaysis 3'. It is dated 1994. The year before he died so it is possibe he directed it. However I have not head it previously in connection with him so I typed the title into imdb and they don't appear to have it (or the first two). Is this a lost Ford film or just something directed by someone of the same name?