Originally Posted by
k_getchell
I am executive platinum with American Airlines (OW Emerald) and the BA MMB system has allowed me to select seat 1 in the past. I've got a flight early next year which I've just gone into and the 1A and 1K option has worked on this booking too.
Indeed, I suspect YouFirst have given incorrect information. I'm in the process of obtaining additional information and will post here in due course ...