Re: On the topic of 'land in Surrey devoted to housing'...
Most of the golf courses in Surrey are built on fairly poor quality land from an agricultural point of view.
For that matter, most of the "greenbelts" are too. The T&C planning act was intended to stop the entire south of england turning into strip suburbia and give ciutydwellers access to greenepaces - but all the greenbelt land is effectively fenced off from City Dwellers.
The entire clusterf* has been mismanaged from the start and amounts to an unwritten farming subsidy (greenbelt land pricing is substantially depressed from prices outside the greenbelts.). It'd be better to create parks, reserves, flood control areas and let the rest be used for whatever purposes come to mind.