As far as I can out from this thread, the article from 2003 by Mike Yates on the Musical Traditions website has not been referenced here. It is called Jumping to Conclusions with a subtitle of Mike Yates examines a row that is bubbling away beneath the surface of British folksong scholarship.
As we might expect from Mike, it is well researched and argued and cogently written and totally relevant to this thread. However, despite being highly critical of Harker, it does not attempt to be the final word; it is an examination rather than a definitive conclusion. It seems to seek responses from Harker and perhaps those who support him to answer charges made and points raised by him. After all this is a discussion an as John Moulden has already stated in this thread (and I have already quoted):-

I wish it could be understood that the point of discussion is not to win an argument but to reach understanding and to be grateful to all those who contribute.

This makes a triumphalist claim that a game has been won sound rather ludicrous.