Thank you for your replies. Yes, by KA I did mean Korean Airlines.
I read the same information which suggests VA
should honor the benefits but that earlier thread suggested they may not and their customer service didn't fill me with confidence either.
I did subsequently read another post which also suggests VA
should honor it (
Vietnam Airlines and Baggage). The OP didn't return to report otherwise so maybe we can deduce there will be no problems.
Thanks again. If anyone else has some recent experience - would still be most appreciated!