John Seymour's guide to self suffiency book recommends around 5 acres for a family, 7 acres if you want woodland to be your income (2 acres would make enough money that by the time you've reached one end, the first rotation has matured)... This could feed a family, suppose 2 parents, 3 or 4 kids. That's about 1 acre per person. You'd need less for vegetarians and vegans.
The UK population is about 0.9 acres per man woman and child, so that seems OK... Not taking into consideration swathes of UK that are uninhabitable, either mountainous or just in the middle of a loch, or is a mud flat. This would leave no space for forests or industry or employment, unless EVERYONE is going to be a farming family. Not likely. If 10% of the households decided to use 2 acres for woodland, that would mean just 1.5% tree cover in the UK. So, we are not even sustainable in our food supplies yet, where would rewilding fit in?
The UK population is about 0.9 acres per man woman and child, so that seems OK... Not taking into consideration swathes of UK that are uninhabitable, either mountainous or just in the middle of a loch, or is a mud flat. This would leave no space for forests or industry or employment, unless EVERYONE is going to be a farming family. Not likely. If 10% of the households decided to use 2 acres for woodland, that would mean just 1.5% tree cover in the UK. So, we are not even sustainable in our food supplies yet, where would rewilding fit in?