“11. In his evidence Lord Butler emphasised the significance of the role of the Cabinet Secretary in supporting policy discussion and decision making between the Prime Minister and other Ministers and the Cabinet Secretary’s role in providing full and frank advice in those process. He considered that the disputed material showed that the authors were candid and frank; they were sensitive to the issues and understood the various tensions which needed to be managed and the disruptive effect on the process if the authors needed to second guess who would have access beyond the intended audience. He had consulted his successor (Sir Jeremy Heywood) who shared the view that he and Dame Susan would have been less open and frank if they thought that their behind the scenes opinions were to be made public. They were aware of FOIA but also aware of the exemptions in FOIA which made provision for free and frank policy discussions. He emphasised the importance of the Cabinet Secretary maintaining positive relations with Ministers “in his role of a neutral and fair mediator”
“21. Very different considerations arise with respect to these different forms of material. The former, the material with a substantive policy content is the core material for FOIA. It is the answer to the question – “Why is the government doing this?”