Originally Posted by fruitcage

It is possible (though unlikely) that one pair could be upgraded, downgraded, offloaded or re-routed differently to the other pair for 'operational reasons'. You can ask BA to put a note on the bookings - called TCP (To Complete Party) that will note that the two bookings are linked. However, that's a manual note and does not stop them treating the two parties separately if necessary, or if done by some automatic process that doesn't read the notes.

My most immediate concern would be getting seats together (if that's what you want of course). You can look at the seat map as if you were going to pay for seat allocation, and use that to monitor the situation and decide whether you want to pay or wait until T-7 days when your Bronze status will let you both book seats for the two pairs.

Overall, I wouldn't worry too much. I have done bookings in two pairs for similar reasons and never had a problem. So no I don't think you've made a faux pas.