Thanks for your post.
If you go to the charities commission website and try to complain about the 1400 or so JW charities, their system will not allow multiple complaints one type of charity...strange that. In order to complain, one would have to write to them, which I'm doing.
You could, as you rightly say, complain about the Bible and Tract Society of GB, yet as you again rightly said, they distance themselves by being an associate charity with all monies being filtered by complex and clouded accounting system. Most of the accounts of the smaller 1400 JW charities fall under the £10k limit and do not have to submit accounts. It would very easy for the JW's to legally manipulate this system to their benefit.
If you search on the Charity Commission web site for "The Bible and Tract Society of Great Britain" it draws a blank. Why?
Even if you look at the “Summary Info” available;
http://www.charitycommission.gov.uk/SIR/ENDS61%5C0001077961_SIR_09_E.PDF
It does not say what money came from where and is spent on what exactly. What I want to know is; a. How much UK Tax Relief/Gift Aid is directed via the Bible and Tract Society and further via to the Watchtower Corp, which then invested into Hedge Funds?