I do quite a few off airfield landings with my students, just pick a field/area, make sure there's no-one around and go for it. If someone reports you, just say you were doing "emergency training", not much the CAA can say against that. Confined areas is in the JAA syllabus, hardly anyone has ever been prosecuted over rule 5 in a heli, and how many members of the public are able to prove how close you were anyway?