C. Heartfield,
Britain has many wonderful things and one of them is not a land surplus. Britons are cheek-to-jowl by any world standard and if they want nature, they have to reserve some spaces for it and, ideally, connect those spaces with some kind of green corridor.
Are you a Marxist or not? Have British young people been priced out of the homes market by lack of greenfield development or by capitalists?
Okay, you want the left to be pro-development but don't forget yourself.