Seat reservation on Iberia having used BA Amex companion voucher

[sydneyRocky]

I have made a reservation via Ba Executive Club helpline LHR – MAD – LIM in business for March using Amex companion voucher.
seat reservations for the BA segments to/from LHR have been made as I am Silver status, however I’m unable to reserve the IB flights. Have tried via link on BA app & website and Iberia website directly, anyone have any idea how I get the seats reserved?

[masaccio]

Is the flight more than ~10 months out? Iberia don’t seem to release seats for a month or two. At least not for me and for others who have asked.

[BA Flyer IHG Stayer]

There was no need to post this twice

https://www.headforpoints.com/forums/topic/how-to-book-seat-on-iberia-flights-having-used-ba-amex-companion-voucher/