KARFA

Actually, the answer is that you can link bookings. Linking bookings (called TCP - To Complete Party) is available to any status, it is not a gold specific benefit. All TCP'ing two bookings does though is add a note on one referencing the other. This can be done by the BA agent on the phone.

However, what is a gold benefit and not available for other tiers is free seat selection for the non-gold/silver booking passenger. If you are a GCH and there is someone travelling on the same flight and in the same cabin on a separate booking, you can request free seat selection for the other person so that you can sit together. This second step, after doing the TCP, is usually sent off to the infamous back office to process and takes a few days to do. It is this second seat selection step which is what you are after Wexflyer, but unfortunately it would not be available to you if you are not a GCH.