The evidence for these FACTS, according to the WSJ article you cited (May 31, 2018), is as follows:
<< When Mr. Downer ended his service in the U.K. this April, he sat for an interview with the Australian, a national newspaper ... Mr. Downer said he officially reported the Papadopoulos meeting back to Australia “the following day or a day or two after” ... The story nonchalantly notes that “after a period of time, Australia’s ambassador to the US, Joe Hockey, passed the information on to Washington.”
My reporting indicates otherwise. A diplomatic source tells me Mr. Hockey neither transmitted any information to the FBI nor was approached by the U.S. about the tip. Rather, it was Mr. Downer who at some point decided to convey his information—to the U.S. Embassy in London. >>
https://www.wsj.com/articles/the-cu...b4f818caf1dc6535ba89d&ref=article_email_share
So there it is: "A diplomatic source tells me." Instead of reporting the information to the Australian Foreign Office as he claimed, Downer told the US Embassy. It was all part of the plan!
I don't understand the distinction you're making.
"The Five Eyes is an intelligence alliance comprising Australia, Canada, New Zealand, the United Kingdom and the United States. These countries are parties to the multilateral UKUSA Agreement, a treaty for joint cooperation in signals intelligence."
https://en.wikipedia.org/wiki/Five_Eyes