I support your viewpoint: the problem is that term you used: "personal inflation rate". There is no such thing. The fact that it is used by some UK government department does not mean it is correct or generally accepted. Present your proposal about "Issues in measuring inflation" without using that term. I am sure it will be generally accepted. Even better if you can back it up with a credible reference. Even if you do not have a reference and you wish to add something new that is valid and generally accepted it will be accepted.