I know this is an older thread, and if this is not the right place for this post then I apologize profusely, but I was watching a british horror film last night, and it was getting nearer the end and I thought to myself "I HAVE SEEN THIS PLACE ON THE INTERNET BEFORE!", sure enough, a quick double check and it was these very same roundhay tunnels, the warning sign was just about visible as well. Below is the imdb link with the film description, if anyone is interested, seems it was mostly filmed in leeds and west yorkshire (the titles mentioned screen yorkshire as well!):
https://www.imdb.com/title/tt5516328/
Cheers,
pb