I found forest area and mass for some other places, and the forest area for England. 10.8 fits, that means trees are between 50 and 100 years old on average whe

I found forest area and mass for some other places, and the forest area for England. 10.8 fits, that means trees are between 50 and 100 years old on average when they're cut (not all of the wood is usable for timber, so it's not just 50, and the UK is bigger than England).