I never said that PH was not valuable to BHP, quite the opposite.
The facts are. BHP has said clearly that they will close mines making a loss (century and probably Avebrey)
BHP has said clearly the are seeking "distressed assets" at "distressed prices".
From the above i would suggest if as you say BHP would buy all of OZL just for PH then they would have to get OZL at a bargain price as Century etc would have no or negative value to BHP as they are not tier 1 assets.
Doesnt seem likely in my opinion, unless OZL becomes distressed. After funds spent on current ramp ups and on AV acquistion i doubt OZL shareholders would accept a low ball offer.
OZL Price at posting:
$5.50 Sentiment: LT Buy Disclosure: Held