No, the jaw must be shorter than both flight segments.
LHR-AUH // HKG-LHR is not valid, as AUH-HKG is longer than LHR-AUH.
Ah, that changes everything then. I guess with my strictly AUH out bound then, my only options are the M.East destinations such as DXB, BAH, maybe MLE also, although I then have the issue of fixing up firm dates before the outbound is flown against availability.
EDIT: Would AUH / BKK be a possibility?