I did a search on here under "Canford Cliffs " and didn't come up with anything so thought I would add this one. I literally stumbled upon it last night and am amazed it had escaped my attention before. It is in the undergrowth fairly near the pavement at the top of Canford Cliffs Chine. It is like a double cube with a tunnel running between with rows of concrete benches. It can be see if you google "canford cliffs" and "airaid shelter" Most probably already on here and I missed it but just in case may be of interest.