Well said John B. Your letter to AVM Wratten, from which you quote, also makes some excellent points. May I suggest that you send him another copy with a polite covering letter explaining that you are doing this because you have not received a reply to the original copy, which may have gone astray in the post? If you still don't get a reply, perhaps a new copy, sent every couple of weeks, will eventually persuade him that a reply is necessary.
I, for one, would be happy to send a letter or two of my own if you could PM me his address.