Originally Posted by
eternaltransit
I'd expect them to get a refund in that case a la BA.
That said, if the flight is full, someone is on a Flex or Flex Plus fare, or there is a group booking (which doesn't have seat charges) and haven't paid for their seat - they can then be moved no problem.
If the flight is not full there is no problem!
Or people who selected at check-in for no charge.