Also airline is responsible to get it back to you even if you have moved onwards. BA cheekily rebooked me on ET (ethiopian)) for the last leg of LHR-OSL-ARN replacing BA on LHR-ARN. ET then became responsible for delivering eight (8) bags to NTL when ET does not even have an office in AU. It was quite a struggle for them, and the cost must have been in great excess of what BA paid for the sector....(although I have a suspicion that emirates who actually carried the bags ate the cost for SYd-NTL).