The ruined church is the same one featured in 'The Witches' (1966). Pics inside
Having recently watched the Hammer's production The Witches (1966) (The Devil's Own in US) I noticed that the church is the same in both movies. According to Wikipedia, this small church is at Bix Bottom in Oxfordshire and was abandoned in 1875. Funding from the Heritage Lottery Fund in 2015 has stabilised and preserved the ruin. Good to know!
Here are some screenshots of both movies, and recent photos:
https://imgur.com/a/mbm7a1w