www.theguardian.com/housing-network/2014/may/21/six-reasons-to-build-on-green-belt
My feeling is that treating the Green Belt as sacrosanct is one of the main reasons why land prices, and therefore house prices, are so high. British house prices have grown faster over the past 40 years than in any other major economy. But new homes become smaller and smaller because of the soaring cost of land.
Much of Green Belt land is not particularly attractive and is not accessible to the public.
The Green Belt has pushed housing development further out into rural areas, thus requiring people to commute longer distances.
Some, like Boris Johnson, say that more land within the cities should be used for housing but this means that parks, playgrounds and playing fields are likely to be sacrificed.
When people are asked what percentage of England is built on, most of them think it is in the region of 50% - it is actually 10.6%, and that includes gardens, parks, allotments and sports pitches. Surrey has more land devoted to golf courses than housing.
England has a severe housing crisis, at its worst in London and the south-east – the area that also has the most Green Belt land. In Greater London, building on just a quarter of it would provide over a million homes.
The Green Belt restricts supply and forces up land and house prices. Cities that are heavily constrained by the Green Belt such as Oxford, London and Cambridge have some of the most unaffordable homes in the country. Using public money to help first time buyers has fuelled demand but has not addressed the issue of supply - therefore pushing up property prices even further.