Seat Selection for BA flight (booked as QFF redemption) separate bookings

[GalaxyNexus]

So I've just booked a flight on BA (with QFF points) in business class (rewards) on which I was able to select seats quite easily (QF Gold / OW Sapphire). Turns out that I had to make another booking for a family member on the same flight, and unfortunately they had no status so wasn't able to select seats for free.

I'm wondering how to rectify this? If I call QF (ugh!) to get the bookings linked, would that work? (or should I call BA instead...?)

On the other hand, being club suites seats, I guess doesn't really matter which seats are they're kind of similar.

Thanks!