Young Dracula - Series 2 - When Vampires Go Bad

Children's drama following the misadventures of Vlad and Ingrid, who have moved to Britain with their father, Count Dracula. The Grand High Vampire turns up unexpectedly and sentences the Count to death, but luckily it's the Grand High Vampire who bites the dust. But who killed him, and why? Surely not even Count Dracula would be this bad?