Could anyone help me in finding out if NF is available on JNB - LHR flight on 4/12 or 5/12 ? I have tried doing a dummy booking via expedia, but i can only notice that one aircraft has the 53 rows, however i cannot check for the other flight since i think it is full in Y.

THanks in advance

PS: According to my workings, it will be BA 055 from LHR leaving on 03/12 having NF, hence leaving as BA 056 from JNB - LHR on 4/12 having NF.