Not England or Wales - but anywhere wild camping on the Isle of Arran in Scotland. The island is known as Scotland in minature and I defy you to find anywhere more beautiful!
Oh and the Holy Isle is a short ferry ride away - Arran truly is a beautiful peaceful scenic place to camp and the 55 minute ferry ride is well worth the visit. Once you have been here you will go back again and again! Maybe I should apply for a job with the Scottish tourist board lol
Nantcol Waterfalls is beautiful, you can have camp fires and pitch where you like, the downside is if you want ehu you are more regimented, i guess because of where the ehu stands are. By the way, it is in Wales near to shell island.