. . . Britain's horror practitioners proceeded to spice up their products considerably. From the blink-and-you'll-miss-them dabs of nudity in pictures like PEEPING TOM and DEVIL DOLL, British horror films were now progressing to exploitative details which would have been unimaginable only five years before. Hammer led the way with a film - their first of the 1970s - which was emblematic not only of relaxed censorship but also of the American desertion of Britain's sinking studios. Apart from a continuation of their Warner Bros liason for three final Draculas, THE VAMPIRE LOVERS, would be Hammer's last film to benefit from American finance; most subsequent films would be backed either by Rank or EMI. It also featured bare breasts galore and a voracious lesbian vampire!
---- - from English Gothic, 2000
. . . so it was left to the independents to find new directions, and there were plenty, some of them interesting, some of them just plain weird. But the contrast between the films of Peter Walker and Anthony Balch, and those of Tyburn, are so great as to warrant a chapter to themselves
---- - from Fragments of Fear, 1996
Ten Years of Terror: British Films of the 1970s
---- - Harvey Fenton and David Flint, 2001.
English Gothic, a century of horror cinema
---- - Jonathan Rigby, 2000.
Fragments of Fear
---- - Andy Boot, 1996.
BFI Companion to Horror
---- - Kim Newman, 1996.
The Overlook Film Encyclopedia of Horror
---- - Phil Hardy, 1993.
---- - Allan Bryce, 2000.
The Hammer Story
---- - Marcus Hearn, Alan Barnes , 1998.
---- - Martin Jones, 2002.
---- - The premier British horror magazine.
---- - another source for the books.