For those that thought Hammer Horror films never went far enough, along comes Vampyres with lashings of gratuitous nudity and violence.
Interesting for:
The fusion of Spanish and British horror tropes.
A realtor's view of Oakley Court (location for Hammer and Rocky Horror).
A brief cameo from Hollywood veteran, Bessie Love.

So far unable to prove that the film was released in the UK prior to 1976