I saw this movie once in high school and still think about it all the time mostly for the fashion. At the time I was listening to a lot of Poppy Family and this is one of the most mod London fashion horror films I can think of. The story and entire film really reminded me of a lot of 60's movies like this where I find that the fashion and aesthetic help carry the film more than the story itself (which i'm okay with most of the time.) The story follows a group of the hip-EST mods in London who are bored at a party that end up in a haunted house that eventually takes them all down or tries to. I still can't figure out if I should include spoilers in this I also don't think anyone reads these LOL
This movie is avail for free on YouTube!