In response to your request for halloween fright stories there used to be one being bandied about when I was at secondary school. Probably pretty weak in comparison to US tales but the story went that at Clophill in Bedfordshire the church had been built west to east and was indeed a place for Satanic worship. When we were in year 7 the six formers used to spread ghostly stories of spending the night up there and of all the people who have supposedly killed themselves or been killed on the spot.
Then when you actually go there you realise it’s a perfectly normal Church ruin. Unloved, grafittied but nothing aupernatural and perfectly ordinary in its alignment. Didn’t stop us from continuing the tradition and scaring the first years though.