We have an Avios/Amex 2-4-1 redemption booked LHR-BOS and are flying out in First on a 747. Looking at the assigned seats, we currently have 5A, 5E and 5F;
I have 5A, the wife's in 5E and 13 year old son in 5F. When I try to re-arrange to give my son 5A, it won't let me place any of us in 5F...