Originally Posted by
ROCruiser
If you are using BA miles for CX flights, you can call BA Executive Club and ask them for a 5-digit reference/locator number for CX. With that number you can get on CX site Manage my booking and select your seats.
Thanks for the suggestion. Tried it, but the CX website just confirmed what others above have said. I'll be checking in at exactly 48 hour prior to departure in a desperate bid to avoid middle seats.