Originally Posted by
Oaxaca
Do be aware that flights on BA metal booked on IB as codeshares rarely (never IME) credit automatically to BAEC, even with your BAEC number in the booking. You’re almost certain to have to submit an online claim a week later using the IB e-ticket number (starting 075), but the Avios and TP should then credit within a couple of days.
That's my experience as well, although at least the TP's and Avios get credited quickly once the claim is submitted, unlike, say, RJ.