Let me just respond, because there are at least two principles at play here. There's the positive and the negative of the privilege. If you ask me if I've spoken to ten people in a client's office and I've only spoken to three of them, I won't tell you about those three but I'll confirm that I haven't spoken to the other seven. That is in and of itself its own waiver of privilege. So whether you consider that the negative or the positive of privilege, those types of questions should not be answered either.
I'm happy for my friend to rephrase the question, but when we're drilling down to things like me producing my notes that are in my personal solicitor's brief, I don't see how that could be rephrased and it become an acceptable question that doesn't trench on privilege.