Unfortunately, just using common sense and flying where you want isn't a responsible policy and will only result in more restrictions. For example you can't fly on any National Trust land or on any Sites or Special Scientific Interest (SSSIs). Depending on where you are you may find that the SSSI restriction blocks out enormous areas. Plus wherever you are you need to have landowners permission to take off and land. It's a tricky problem but there's enough sky up there if the community use it responsibly.