The Daily Telegraph weekend colour supplement carried a two page article describing a bunker in the Yorkshire Dales...... see also http://12121.hostinguk.com/bunkerloc.htm.
Purchased via Ebay for £11,300 in 2003 by Ged and Sandra Dodd (ex ROC) it will take a while to recover the investment based on the holiday rental quoted.
Convenient for Dent station on the Settle Carlisle Railway.
"Visitors can pick their own night to stay over - providing no one else has already booked that night. PLEASE NOTE THERE ARE ONLY FOUR VISITS PER YEAR."
from uk. rec. subterranea