There's a difference between wild camping legally and wild camping secret (without land owners permission) and most people mean the latter when they ask about this. If it is the latter we can't really help, it damages the relationship between us and landowners and that's not a good thing.
However, having land owners permission doesn't mean suddenly that it's not wild camping, and there's also plenty of places in England to wild camp where it's generally accepted, over certain elevations or example, I"m sure there are a few people on here that can point out those places and any wilderness campsites that are good for getting off the beaten track so to speak.