Paul Hyett showed a couple of clips from Howl at Glasgow Frighfest last week, and also gave an interview to Screen International which you can read here.
Accompanying the article are three terrific stills from the film. Here's Ed Speleers (A Lonely Place to Die, Love Bite) as Joe and Holly Weston (Splintered, Dementamania) as Ellen.
Here's blood-spattered Amit Shah (The Facility) as Matthew:
And because it wouldn't be a proper British horror film without him, here's Sir Sean Pertwee as Tony: