Originally Posted by midlevels

Not true, you can also use Asia Miles to upgrade on BA and AA, but only for roundtrips, not one way.

In any case, as you said, it's not likely that the OP would earn enough miles for an upgrade from J to F. For example, to upgrade the CX flight from HKG-LHR from J to F, one would need to spend 50,000 miles per passenger for one way only.