This is Borleymere Shepherds Hut. For readers of Terry Pratchett this holiday accommodation is perfect. It's a shepherding hut like the one belonging to Tiffany's Granny Aching (check out Wee Free Men, Hat Full of Sky, Wintersmith, and I Shall Wear Midnight).
Here is an extract from "The Folklore of Discworld" by Terry Pratchett and Jacqueline Simpson:
"Iron-wheeled shepherding huts were sturdy wooden structures, warmed by a small stove, with a chair, a table, a simple bunk bed, and plenty of shelves, boxes and hooks to hold the shepherd's gear."
How utterly romantic. It's on my wish list.