I'm helping my parents booking their vacation in February 2015 with their Avios and 241. Following advice about booking what you can find outbound, I've booked their outbound to JNB and am hoping to nab 2 F seats on the return from CPT, however the seats are not released yet.
When the 355 day limit is up, and if I'm lucky enough to find 2 F seats, how do I add it to the existing outbound booking - in particular using the 241 voucher I've already used on the outbound journey?
Appreciate any advice. Tried a search but got swamped. Thanks