Dr Emyr Williams, who works at Glyndwr University, in Wrexham, calls real vampires a 'global phenomenon'.

A psychology lecturer at a British university claims the UK has a population of about 15,000 vampires, and is carrying out an academic study into their lifestyles.

Dr Emyr Williams, a senior lecturer from Glyndwr University in Wrexham, wants to discover more about Britain's vampire subculture, following the surge in popularity of films and TV shows about them.