I own the U.K. Blu-ray of The Blood Beast Terror. Some notes:
Extras:
Interview with Wanda Ventham (25:57)
Theatrical trailer (2:18)
Photo slideshow [HD] (2:01)
Note: Extras in SD (576i50) unless otherwise indicated.
(Although the disc is region-free, many American players cannot access the interview and trailer because these are 50 Hz video.)