Yes completely full via London for several days which is what caused the problem as have to be back by 29th for another trip. But then they should allow re routing on the return leg of my redemption ticket (transiting elsewhere) which they haven’t - they found a seat from ZRH on Friday but wouldn’t allow the ticket re-routing. So had to spend more miles on a brand new ticket and leave the original return open for a later rebooking. A bit messy. And hope they don’t cause a problem when I am no show for the original return. And out of pocket for the reposition flight in Europe as mentioned above.