At the top of Swains Lane lies the North Gate of Highgate Cemetery in London where in 1963 two convent girls claimed to see what appeared to be dead bodies leaving their tombs. Weeks later a couple reported seeing something hovering behind the gate. Reports followed of other ghost sightings inside and outside the Cemetery, and word got out about these happenings. Paranormal investigators were drawn to the scene which led to the infamous story of The Highgate Vampire. Two men became linked to the case.
The first was David Farrant, founder of the British [Psychic and] Occult Society who was investigating the reports of a figure. The second was Sean Manchester, a self proclaimed exorcist and founder of the British Occult Society and Vampire Research Society. Both have published books about their roles in the case and have been fierce rivals over the years. Farrant spent a night in the Cemetery and witnessed the figure for himself and when he wrote to the media about it, interest doubled. The discovery of dead foxes with throat injuries had people speculating about vampires, especially with the popularity of the Hammer Horror Dracula films of the 60s and 70s.
Farrant's account: http://www.mysteriousbritain.co.uk/england/greater-london/hauntings/the-highgate-vampire-how-it-all-began-by-david-farrant.html
Sean Manchester was credited with the story of an nobleman in Eastern Europe who studied black magic, was smuggled into England and buried in Highgate Cemetery, and had risen. The Highgate Vampire was born. The media went wild and filmed live as rumours erupted of a real life vampire hunt in March 1970 which caused people to scale the walls and rampage through the Cemetery. Photos of the North Gate and the media coverage can be found here:
Was there a vampire? Sean Manchesters says yes and claimed to have killed it. His account of this can be found in his book The Highgate Vampire. David Farrant disagrees and so do others including the author of this article, featuring part of Manchester's account, and photos of the area and examines confusing accounts of both men. This is why the story of The Highgate Vampire remains to this day.
One thing I can say on this case-whatever was seen at the North Gate and beyond fascinates me and I'd love to visit Highgate Cemetery myself!