^According to the synopsis in the link, it's a voodoo-type movie. Which makes sense for 1966, since the co-opting of "zombie" for non-voodoo-related walking dead pretty much began with Romero's Night of the Living Dead two years later.
I've seen it. It's definitely old-fashioned voodoo zombies, albeit set in Cornwall, rather than Haiti or New Orleans.
As I recall, it's worth checking out . . ..