I absolutely will. This is with respect to your obligations as chair. The green book cites that:
The obligation of a witness to answer all questions put by the committee must be balanced against the role that public servants play in providing confidential advice to their Ministers. The role of the public servant has traditionally been viewed in relation to the implementation and administration of government policy, rather than the determination of what that policy should be.
I think, Chair, as I have said before, this line of questioning is absolutely against the convention within committee practice.