Anyone know if BA55 or BA57 is likely to have any space available in D on Sunday?

I am waitlisted but wondered if any regulars knew if this tends to clear nearer the time or is it generally booked solid....

----- 01 -----
LHR JNB 0208-1750/0209-0645 BA 55 F0 A0 J0 C0 D0 I0 W5 T4 Y9 B9 H9 K9 M9 R9 V9 N9 L9 S9 Q9 O9 (744)
----- 02 -----
LHR JNB 0208-2000/0209-0855 BA 57 F0 A0 J0 C0 D0 I0 W0 T0 Y9 B9 H9 K9 M9 R9 V9 N6 L9 S9 Q6 O9 (744)