Currently playing a game of chicken with purchasing seats for WT, given each is running $60+... would love to get a sense of loads and if I'm about to lose and need to pony up

5/5: BA 278 SJC-LHR
5/6: BA 59 LHR-CPT

5/20: BA 56 JNB-LHR
5/21: BA 285 LHR-SFO

thanks in advance!