I would say that The Secret Dungeon in High Wycombe would very much first the bill of a venue at which one could scream.
It is also very sizeable, comfortable with good ambience, well-appointed with a kitchen, luxury bathroom and overnight facilities.
There is in addition a hot tub at the rear of the dungeon. It is a wooden built up area with smoking facility and is accessible to anyone using the dungeon, day or night.
There is also parking for up to two cars and High Wycombe train station is no more than two to three minutes away, if that.
http://www.thesecretdungeon.co.uk