Telegraph: Studland beach, which includes a nudist stretch, is part of 180 miles of trust coastline in the south west that is slowly disappearing. In the last quarter of a century the sea has encroached about 300 feet in some parts of the Dorset beach that was said to be Princess Diana’s favourite. The National Trust has tried to stem the erosion with gabions, metal grilles filled with rocks, which are supposed to soak up the force of the waves. However, they were washed away. …