Thank you, I will have another look. From what I could find, they suggested a generous amount of land.
Looking at the applications on the estate the council rejected they are using -
NPPF and PPG2 do not formerly define "openness" and it's down to interpretation. Rather than being law it's planning and judgment. There is a difference between impacts on visual amenity, which normally considered within the process of Landscape and Visual Impact Assessment (LVIA) and the visual aspects of openness which are considered part of the greenbelt assessment. The former, an assessment is made on the effects of the development on the views available to people and their visual amenity and how this may affect character and scenic quality.
NPPF -
Paragraph 131 of the NPPF recognises the importance of good design in positively contributing to making places better for people.
Local plan policies -
Solihull Local Plan - P10
Recognises the importance of a healthy natural environment in its own right.
Solihull Local Plan - P15
Seeks to ensure that development proposals achieve good quality, inclusive and sustainable design that conserves and enhances the local character, distinctiveness, and streetscape quality.
Solihull Local Plan - P14
The Council will seek to protect and enhance the amenity of existing and potential occupiers of houses, businesses, and other uses in considering proposals for new development and will, inter alia, permit development only if it respects the amenity of existing and proposed occupiers and would be good neighbour.