About 70% of the land in the UK will never be built on for various reasons. This leaves 30%. That 30% contains all the towns, cities, suburbs, and various indus

About 70% of the land in the UK will never be built on for various reasons. This leaves 30%. That 30% contains all the towns, cities, suburbs, and various industrial estates, ports, airports and so on. The actual amount of land vaguely available for projects of any sort is rather small, and those projects face heavy headwinds in terms of planning permissions, NIMBYs, and other interests expressed often by people living nowhere near the land in question.