Originally Posted by
breathwell
Yes, it is a separate onwards booking, so (with luggage) they would have to check in most likely. ("most likely" = unless they check in online and decide to travel only with hand luggage, then no landside check-in would have been necessary in theory)
Well if there is luggage to be checked in, obviously there is no other way. And unfortunately there is no way a non-passenger can access the airside lounge.