Originally Posted by
robski
I booked this direct with Fijiian on the same day the alliance was announced purely by coincidence on 6th June but couldn't add my BA Number to the Fiji booking.
The
announcement on 3 June 2018 did say this:-
The first airline to join in the new capacity as a oneworld connect partner will be Fiji Airways.
A date will be announced in due course for when Fiji Airways will start offering oneworld connect services and benefits (see below). Meantime, it is business as usual.
In this case, unfortunately for you, "business as usual" means that Fiji Airways is not a oneworld airline and not a BAEC partner, with no BAEC earn or burn on Fiji Airways flights.