We have had issues selecting seats in advance (75K, OW Emerald) on BA since ....forever. Have used the Finnair work-around once and on our last BA flight it worked smoothly, but we've just booked two more tickets and both will not allow complimentary seat selection. Finnair also is not allowing addition of FF number to reservation. I've searched here and on the BA board, but not coming up with any answers. I'm relying on FT'ers to tell me the latest, greatest fix. Hubby is racing me on hold with partner desk to see who can fix it first. It's another exciting night in the suburbs.