Fair enough that worked for you. Hopefully your advice works for the OP p, but. I merely have giving some advice. Since it was a foster child, one can still fill in a guardian form I would have thought, but if that makes you choose another airline, so be it.

trying to link bookings in BA for a number of reasons seems to be a problem for one reason or another, so plan B may be worth it, but that may just be my opinion of course