The Lair of the White Worm (1988)
Just watched this on FEARnet On Demand and was surprised at how young Peter Capaldi looks. I almost didn't recognize him. Capaldi plays an archaeologist who unearths an unusually large snake skull. Legend tells that it was slain by the ancestor of Hugh Grant's character. The sexy villainess played by Amanda Donohoe is actually an immortal vampire priestess. She steals the skull and plans to sacrifice a virgin to her snake god Dionin. It's all the fun of a Hammer Film without actually being a Hammer movie. The specials effects are pretty low budget and there's a little bad acting but other than that it's a really solid B-movie.