I'll check out the link and sources and get back to you.
Why do you think that Boris didn't refer to this report in his recent meetings with Merkel? He seemed to say that he would be able to provide solutions before the EU meetings in mid October. Why was no reference made to it then?
And out of interest, if the backstop issue was sorted, would you then accept the WA and compromise on the other reservations many Brexiteers have about the WA?