Well said Rich. The restrictive state of rural planning today is a direct result of factors such as those you mentioned Rich and 'bungalow blight', which in the later part of the last century saw people moving into the countryside, buying plots of land and erecting buildings that had did not have a sympathetic relationship with the surrounding countryside.
Now this land is scarce and development in many parts is given to people from local communities (no bad thing IMO). Of course land now costs an awful lot but, there are many beautiful delapidated buildings in the countryside that are crying out for regeneration and it is these that can also provide a model for sustainable redevelopment. After all, reusing what is already there is probably the most sustainable form of development. Coupled with green technologies which enable the buildings to function in the way they were intended (breathe) and with minimal impact on the environment.
Lets hope Bens house doesn't end up in the weald and downland museum!
I was lucky enough to attend a lecture by the architect who deigned the Gridshell that was shown in the programme and his ideas on sustainable/green development was inspirational stuff.