I've got an interesting one. Made a booking for a friend (BA Gold/OWE) and her child via Finnair with the final outbound leg HGK-BNE in economy. On CX website, says seat selection possible only at airport. Seat map looks mental with nearly half the cabin blocked out, but even then, there are plenty of unblocked seats. Tried RJ, MH, etc. No luck. Finally tried the chat via website and they said that because it's a codeshare (AY flight number in this case), seat selection is not possible until airport. From experiences above, seems that there is some weirdness when one person is OWE and the other has no status, but the idea that it being a codeshare is the sticking point seems like BS. Any ideas for a work around?