> UK's forests are already up to "medieval" levels That is not a very high standard; as far as I recall, Britain has been a cultured landscape at the very leas

> UK's forests are already up to "medieval" levels That is not a very high standard; as far as I recall, Britain has been a cultured landscape at the very least since the Iron Age. (Related to that is the fact that medieval population of Britain has also been roughly at Iron Age levels, or vice versa. There were apparently around four million people in Iron Age Britain.)