Found this one on the way to Wookey Hole, Haybridge is the village just before you get there. Its little more than a street with a few houses and some kind of works depot on the other side, anyhoo, when I spotted a phonebox I hadn't seen before I had to stop and get my camera out.
Its a dusty looking phonebox, still awaiting a fresh lick of paint, but it had a rather fine collection of books, four shelves of a custom-made bookcase, bolted on where the phone used to be. Around a hundred books, with children well-catered for.
Haybridge is about three villages east of Westbury-sub-Mendip, which let me remind you, was the first documented phonebox library. Although when I drove through Westbury, I could see no phone box.