Thanks for checking this out for me, Empress. I guess the chaos from heavy loads on the first weeks of flying this new route has dissapated. I will know for certain on Sunday afternoon, of course. Usually go for seat 4A, since as you note, 5A is blocked off (though not on LHR flights as I've noticed on the past three trips), but I'd settle for any of the singles if they are still open when I call.