BEags, I guess you are in the loop.
Although the boom on the Oz KC-30As is not yet cleared - and might still be a way off - it is cleared to hose tank F/A-18A Classics and F/A-18F Supers. Hawks, not sure yet.
(The boom of course will be helpful for C-17, E-7 Wedgetail, P-8 Poseidon. I doubt C-27J is AAR.)
But as we are now ahead of UK in this area, is there any exchange of T&E data occurring?