As an aside (with apologies for sloppy definitions), I understand that the UK is about 0.1% densely built on (more than 80% of ground covered by artifical surface), and about 5.5% urban.
I understand this is much, much less than people typically think, which isn't just an interesting fact; people base their opinions on development on the unchecked feeling that the UK is 50% concrete.
I understand this is much, much less than people typically think, which isn't just an interesting fact; people base their opinions on development on the unchecked feeling that the UK is 50% concrete.