Demonstrable consent would be required when you have a substantive change such as in systems or the method of delivery, such as changing from an encrypted PDF to something else. In this case, it is a common email address. That shouldn't be "substantive" in my book.
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AndyZ CRCM
My opinions are not necessarily my employers.
R+R-R=R+R
Rules and Regs minus Relationships equals Resentment and Rebellion. John Maxwell